{"id":1515,"date":"2025-02-11T14:00:27","date_gmt":"2025-02-11T08:30:27","guid":{"rendered":"https:\/\/www.labkafe.com\/blog\/?p=1515"},"modified":"2025-04-02T15:26:11","modified_gmt":"2025-04-02T09:56:11","slug":"titration-of-mohrs-salt-with-kmno4","status":"publish","type":"post","link":"https:\/\/www.labkafe.com\/blog\/titration-of-mohrs-salt-with-kmno4\/","title":{"rendered":"Titration of Mohr&#8217;s Salt with KMnO4\u00a0"},"content":{"rendered":"\n<p>Titration of Mohr&#8217;s Salt with KMnO4&nbsp;explained in detail with complete theory and procedure for Board Exams in India. <\/p>\n\n\n<h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#titration-of-mohrs-salt-with-kmno4-theory\">Titration of Mohr&#8217;s Salt with KMnO4: Theory<\/a>\n\n<\/li>\n<li><a href=\"#titration-of-mohrs-salt-with-kmno4-apparatus\">Titration of Mohr&#8217;s Salt with KMnO4: Apparatus<\/a>\n\n<\/li>\n<li><a href=\"#titration-of-mohrs-salt-with-kmno4-procedure\">Titration of Mohr&#8217;s Salt with KMnO4: Procedure<\/a>\n\n<\/li>\n<li><a href=\"#titration-of-mohrs-salt-with-kmno4-calculation\">Titration of Mohr&#8217;s Salt with KMnO4: Calculation<\/a>\n\n\n<ul><li>\n<a href=\"#normality-of-kmno4-solution\">Normality of KMnO4 solution:<\/a>\n\n<\/li>\n<li><a href=\"#strength-of-kmno4-solution\">Strength of KMnO4 solution:<\/a>\n\n<\/li>\n<li><a href=\"#molarity-of-kmno4-solution\">Molarity of KMnO4 solution:<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#results-and-discussion\">Results and Discussion<\/a>\n\n<\/li>\n<li><a href=\"#precautions\">Precautions<\/a>\n\n\n<ul><li>\n<a href=\"#beware-of-mechanical-errors-during-titration\">Beware of Mechanical Errors during Titration<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#frequently-asked-questions-faq-viva\">Frequently Asked Questions (FAQ)\/ VIVA<\/a>\n<\/li><\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"titration-of-mohrs-salt-with-kmno4-theory\">Titration of Mohr&#8217;s Salt with KMnO4: Theory<\/h2>\n\n\n<p>Potassium permanganate is a strong oxidant in the presence of sulfuric acid. Mohr salt is a double salt forming a single crystalline structure having the formula FeSO<sub>4<\/sub>.(NH<sub>4<\/sub>)<sub>2<\/sub>SO<sub>4<\/sub>.6H<sub>2<\/sub>O. The chemical name for Mohr\u2019s salt is ferrous ammonium sulfate.<\/p>\n\n\n\n<p>In this titration Mohr salt acts as a reducing agent and potassium permanganate acts as an oxidizing agent. Acid Base Titration with Mohr&#8217;s Salt against KMnO4&nbsp;is an example of redox reaction. In this redox reaction, ferrous ion from Mohr\u2019s salt gets oxidized and pink colored of manganese present in potassium permanganate, which is in the +7-oxidation state gets reduced to colorless Mn<sup>2+<\/sup> state.<\/p>\n\n\n\n<p>The chemical reaction and the molecular chemical equation is given below.<\/p>\n\n\n\n<p>Reduction half reaction \u2013<\/p>\n\n\n\n<p>2KMnO<sub>4<\/sub> + 3H<sub>2<\/sub>SO<sub>4 <\/sub>\u2192 K<sub>2<\/sub>SO<sub>4<\/sub> + 2MnSO<sub>4<\/sub> + 3H<sub>2<\/sub>O + 5[O]<\/p>\n\n\n\n<p>Oxidation half reaction \u2013<\/p>\n\n\n\n<p>[2FeSO<sub>4<\/sub>(NH<sub>4<\/sub>)<sub>2<\/sub>SO<sub>4<\/sub>.6H<sub>2<\/sub>O + H<sub>2<\/sub>SO<sub>4<\/sub> + [O] \u2192 Fe<sub>2<\/sub>(SO<sub>4<\/sub>)<sub>3<\/sub> + 2(NH<sub>4<\/sub>)<sub>2<\/sub>SO<sub>4<\/sub> + 13H<sub>2<\/sub>O] x 5<\/p>\n\n\n\n<p>Overall reaction \u2013<\/p>\n\n\n\n<p>2KMnO<sub>4<\/sub> + 10FeSO<sub>4<\/sub>(NH<sub>4<\/sub>)<sub>2<\/sub>SO<sub>4<\/sub>.6H<sub>2<\/sub>O+ 8H<sub>2<\/sub>SO<sub>4 <\/sub>\u2192 K<sub>2<\/sub>SO<sub>4<\/sub>+ 2MnSO<sub>4<\/sub>+ 5Fe<sub>2<\/sub>(SO<sub>4<\/sub>)<sub>3<\/sub>+ 10(NH<sub>4<\/sub>)<sub>2<\/sub>SO<sub>4<\/sub>+ 68H<sub>2<\/sub>O<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"titration-of-mohrs-salt-with-kmno4-apparatus\">Titration of Mohr&#8217;s Salt with KMnO4: Apparatus<\/h2>\n\n\n<p>We will need the following to perform Acid Base Titration with Mohr&#8217;s Salt Against KMnO4&nbsp;as an example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Burette<\/strong> \u2013 Filled with <strong>KMnO\u2084 (Potassium Permanganate) solution<\/strong><\/li>\n\n\n\n<li><strong>Conical Flask<\/strong> \u2013 Contains <strong>10 mL of Ferrous Ammonium Sulfate (Mohr\u2019s salt) and sulfuric acid<\/strong><\/li>\n\n\n\n<li><strong>Pipette<\/strong> \u2013 To accurately measure and transfer Mohr\u2019s salt solution<\/li>\n\n\n\n<li><strong>Funnel<\/strong> \u2013 To fill the burette without spillage<\/li>\n\n\n\n<li><strong>Retort Stand with Clamp<\/strong> \u2013 To hold the burette securely<\/li>\n\n\n\n<li><strong>White Tile (optional)<\/strong> \u2013 To enhance visibility of the color change at the endpoint<\/li>\n\n\n\n<li><strong>Distilled Water<\/strong> \u2013 For dilutions and rinsing apparatus<\/li>\n\n\n\n<li><strong>Wash Bottle<\/strong> \u2013 For rinsing the conical flask<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"701\" height=\"599\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXc-sRswfaAiIT6vFxnnwf7mh73u3kht7FynZ7NFMp5TXUkIvJ8uK2rvan_XQrwvNT8Pm_ykpVsbN1SwhaYx6FHGF6n3w_DJ1qBkpC4PMMjP8kd7DsbC_M-gj40H__YEWji0LrHOEA.png\" alt=\"Burettes for Chemistry Board Exam Practical by Labkafe- Used for Acid Base Titration\" class=\"wp-image-1525\" style=\"width:377px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXc-sRswfaAiIT6vFxnnwf7mh73u3kht7FynZ7NFMp5TXUkIvJ8uK2rvan_XQrwvNT8Pm_ykpVsbN1SwhaYx6FHGF6n3w_DJ1qBkpC4PMMjP8kd7DsbC_M-gj40H__YEWji0LrHOEA.png 701w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXc-sRswfaAiIT6vFxnnwf7mh73u3kht7FynZ7NFMp5TXUkIvJ8uK2rvan_XQrwvNT8Pm_ykpVsbN1SwhaYx6FHGF6n3w_DJ1qBkpC4PMMjP8kd7DsbC_M-gj40H__YEWji0LrHOEA-300x256.png 300w\" sizes=\"(max-width: 701px) 100vw, 701px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">Burettes for Acid Base Titration Example Mohr&#8217;s Salt Against KMnO4 for Board Exam Practical by Labkafe<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#403dd9\" class=\"has-inline-color\"><a href=\"http:\/\/labkafe.com\/?utm_source=blog\">LABKAFE<\/a><\/mark><\/strong> provides all necessary apparatus for Chemistry practical exams for CBSE, ICSE, and all State Boards, along with compatible lab furniture. Browse our compact Chemistry Lab Packages <mark style=\"background-color:rgba(0, 0, 0, 0);color:#463dd9\" class=\"has-inline-color\">(<\/mark><a href=\"https:\/\/www.labkafe.com\/blog\/chemistry-lab-equipment-list\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#503dd9\" class=\"has-inline-color\"><strong>CBSE<\/strong><\/mark><\/a><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#503dd9\" class=\"has-inline-color\">, <\/mark><\/strong><a href=\"https:\/\/www.labkafe.com\/blog\/isc-chemistry-lab-equipment-package\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#503dd9\" class=\"has-inline-color\"><strong>ISC<\/strong><\/mark><\/a><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#503dd9\" class=\"has-inline-color\"> and <\/mark><\/strong><a href=\"https:\/\/www.labkafe.com\/blog\/physics-lab-apparatus\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#503dd9\" class=\"has-inline-color\"><strong>State Boards<\/strong><\/mark><\/a><mark style=\"background-color:rgba(0, 0, 0, 0);color:#463dd9\" class=\"has-inline-color\">)<\/mark> which includes every piece of equipment needed for your specific board exam practical. For any queries or requirements, get in touch with our lab experts today!<\/p>\n\n\n\n<p class=\"has-text-align-center has-base-2-color has-contrast-background-color has-text-color has-background has-link-color wp-elements-879beff1ee8ffe458acad59e07b9db3b\"><strong><a href=\"http:\/\/LABKAFE.COM\/?utm_source=blog\">FREE LAB CONSULTATION!<\/a><\/strong><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"titration-of-mohrs-salt-with-kmno4-procedure\">Titration of Mohr&#8217;s Salt with KMnO4: Procedure<\/h2>\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"751\" height=\"822\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" alt=\"Acid Base Titration Example Mohr's Salt Against KMnO4\u00a0showing color change at end point\" class=\"wp-image-1517\" style=\"width:378px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png 751w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-5-274x300.png 274w\" sizes=\"(max-width: 751px) 100vw, 751px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">Setup for Acid Base Titration example with Mohr&#8217;s Salt Against KMnO<sub>4<\/sub>&nbsp;(Image- Byju&#8217;s)<\/p>\n\n\n\n<p>Acid Base Titration with example Mohr&#8217;s Salt Against KMnO4&nbsp;is performed as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wash the burette with distilled water, then KMnO<sub>4<\/sub>.<\/li>\n\n\n\n<li>Fill the burette with KMnO\u2084 using a funnel up to the zero mark at the top. Do this while the burette is on the ground, as filling it while placed on a table can be difficult\u2014lab benches are high, and many students take practical exams in schools other than their own. This might mean performing the experiment on unfamiliar lab benches.&nbsp;<\/li>\n\n\n\n<li>Always remember to remove air from the nozzle by opening the stopcock slightly. This ensures accuracy. Dispense the excess KMnO\u2084 into a separate test tube to prevent spills on the table. The nozzle tip holds some volume. The total volume is measured from the tip to the zero mark at the top of the burette.<\/li>\n\n\n\n<li>Fill the burette with excess KMnO\u2084 initially and drain it until the level reaches the zero mark. Note the upper meniscus for these experiments.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"543\" height=\"1024\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-8.png\" alt=\"Initial Position, start\" class=\"wp-image-1521\" style=\"width:180px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-8.png 543w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-8-159x300.png 159w\" sizes=\"(max-width: 543px) 100vw, 543px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use a glass pipette to transfer Mohr\u2019s salt. Partially block the pipette&#8217;s opening with your finger and gently inhale to draw the solution into the pipette. This helps pull in enough solution. The ring marked at the top of the stem indicates the 20 mL marking for this 20 mL glass pipette.<\/li>\n\n\n\n<li>After filling the pipette, keep your finger in place and release it when ready to dispense the Mohr\u2019s salt solution into the conical flask. Ensure the flask is washed with soap and clean water and dried completely to prevent interference with reaction volumes.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"234\" height=\"469\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-7.png\" alt=\"Dispense acidified Mohr's salt solution into Erlenmeyer flask\" class=\"wp-image-1519\" style=\"width:168px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-7.png 234w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-7-150x300.png 150w\" sizes=\"(max-width: 234px) 100vw, 234px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Each drop must be dispensed into the flask, as even a single drop remaining in the pipette could affect your final reading. If you want to avoid using a mouth pipette, you can also use a 20 mL test tube to transfer the Mohr\u2019s salt solution.<\/li>\n\n\n\n<li>Open the burette stopcock slowly and dispense the KMnO\u2084 drop by drop. Maintain your eye level parallel to the markings on the burette to avoid parallax error. Keep rotating the conical flask in a circular motion to ensure proper mixing.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"1024\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop-576x1024.jpg\" alt=\"Add KMnO4 solution drop by drop to the conical flask\" class=\"wp-image-1522\" style=\"width:185px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop-576x1024.jpg 576w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop-169x300.jpg 169w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop-768x1365.jpg 768w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop-864x1536.jpg 864w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/acid-base-titration-add-Kmno4-drop-by-drop.jpg 1080w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Approximately 17\u201320 mL of KMnO\u2084 is usually required. Carefully monitor the measurement once the burette crosses the 17 mL mark. At this point, control the stopcock with one hand while continuing to rotate the conical flask with the other.<\/li>\n\n\n\n<li>Take three readings to find the final average value, as this provides a more accurate result. This is also required as per Board Exam rules.&nbsp;<\/li>\n\n\n\n<li>The endpoint is when a light pink color first appears, not when the solution becomes dark pink or violet. Stop the burette stopcock immediately as soon as the solution turns light pink.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"318\" height=\"613\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-9.png\" alt=\"Final reading obtained in the Acid Base Titration Example with Mohr's Salt Against KMnO4\u00a0\" class=\"wp-image-1523\" style=\"width:185px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-9.png 318w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/image-9-156x300.png 156w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The moment the solution turns light pink, take the reading from the burette. This reading indicates the amount of KMnO\u2084 required to neutralize the Mohr\u2019s salt solution.<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"titration-of-mohrs-salt-with-kmno4-calculation\">Titration of Mohr&#8217;s Salt with KMnO4: Calculation<\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"normality-of-kmno4-solution\">Normality of KMnO<sub>4<\/sub> solution:<\/h3>\n\n\n<p>Consider &#8220;y&#8221; ml of given KMnO4 solution is equivalent to 20 ml of N\/10 Mohr\u2019s salt solution.<\/p>\n\n\n\n<p>According to law of equivalents,<\/p>\n\n\n\n<p>N1V1 = N2V2<\/p>\n\n\n\n<p>N1, N2 are normality of Mohr\u2019s salt and KMnO4 solution respectively.<\/p>\n\n\n\n<p>V1, V2 are volumes of Mohr\u2019s salt and KMnO4 respectively.<\/p>\n\n\n\n<p>1\/10 x 20 = N2 x y<\/p>\n\n\n\n<p>N2 = 2\/y<\/p>\n\n\n\n<p>N = Normality of given KMnO4 solution = 2\/y<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"strength-of-kmno4-solution\">Strength of KMnO<sub>4<\/sub> solution:<\/h3>\n\n\n<p>Strength = Normality x Equivalent mass<\/p>\n\n\n\n<p>Equivalent mass of KMnO4 =<\/p>\n\n\n\n<p>= 158\/5 = 31.6 = 2\/y x 31.6 g\/liter<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"molarity-of-kmno4-solution\">Molarity of KMnO<sub>4<\/sub> solution:<\/h3>\n\n\n<p>N = M x Number of electron gained<\/p>\n\n\n\n<p>N = M x 5<\/p>\n\n\n\n<p>M = N\/5 moles\/ liter<\/p>\n\n\n\n<p>The strength of and molarity of a given KMnO4 solution is found out as 2\/y x 31.6 g\/l and N\/5 moles\/liter, respectively.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"results-and-discussion\">Results and Discussion<\/h2>\n\n\n<p>Molarity of given KMnO4 solution is _________ moles\/liter<\/p>\n\n\n\n<p>The strength of given potassium permanganate solution is _______ g\/L<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"precautions\">Precautions<\/h2>\n\n\n<p>Beware of these traps if you don&#8217;t want to feel like this student during your practical exam. <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXcygVvBHM2zJjPLsVoyy61l5wtOCkbcYCAJZJEQ34mrRC75303JbCaRYXwGLt9gG-qR5vle9OjLTI3OFcszmTO58nECr_mrqP_zhUk33Zcuks_oHlujYrRzt55WNzeyMjBHHxiG.png\" alt=\"\" class=\"wp-image-1526\" style=\"width:355px;height:auto\" srcset=\"https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXcygVvBHM2zJjPLsVoyy61l5wtOCkbcYCAJZJEQ34mrRC75303JbCaRYXwGLt9gG-qR5vle9OjLTI3OFcszmTO58nECr_mrqP_zhUk33Zcuks_oHlujYrRzt55WNzeyMjBHHxiG.png 1024w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXcygVvBHM2zJjPLsVoyy61l5wtOCkbcYCAJZJEQ34mrRC75303JbCaRYXwGLt9gG-qR5vle9OjLTI3OFcszmTO58nECr_mrqP_zhUk33Zcuks_oHlujYrRzt55WNzeyMjBHHxiG-300x300.png 300w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXcygVvBHM2zJjPLsVoyy61l5wtOCkbcYCAJZJEQ34mrRC75303JbCaRYXwGLt9gG-qR5vle9OjLTI3OFcszmTO58nECr_mrqP_zhUk33Zcuks_oHlujYrRzt55WNzeyMjBHHxiG-150x150.png 150w, https:\/\/www.labkafe.com\/blog\/wp-content\/uploads\/2025\/02\/AD_4nXcygVvBHM2zJjPLsVoyy61l5wtOCkbcYCAJZJEQ34mrRC75303JbCaRYXwGLt9gG-qR5vle9OjLTI3OFcszmTO58nECr_mrqP_zhUk33Zcuks_oHlujYrRzt55WNzeyMjBHHxiG-768x768.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Acid Base Titration with example Mohr&#8217;s Salt Against KMnO<sub>4<\/sub>&nbsp;must be done with these secret tips in mind. This will give you an edge over other candidates. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Don&#8217;t dispense a large amount of KMnO\u2084 at once initially<\/strong>, as this can lead to errors. Even if you have an estimated value in mind, other issues may arise, and the reaction will take longer to complete.<\/li>\n\n\n\n<li><strong>Keep rotating the conical flask continuously\u2014do not stop even for a second<\/strong>. If you stop by mistake, the KMnO\u2084 will not mix properly and will remain in the solution. Later, when it dissolves, the color will appear much darker than needed, meaning the endpoint has been crossed. To prevent this, ensure you keep stirring and stop precisely at the point where the solution turns light pink. A single extra drop can result in a deeper pink color, making your reading inaccurate.<\/li>\n<\/ul>\n\n\n<h3 class=\"wp-block-heading\" id=\"beware-of-mechanical-errors-during-titration\">Beware of Mechanical Errors during Titration<\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Never attempt to add excess KMnO\u2084 to the burette if you miss the correct endpoint<\/strong>. If you exceed the endpoint and try to adjust by adding more KMnO\u2084 to the burette to match the expected reading (you know what I mean), it will be a serious mistake. Not only is this considered cheating, which may lead to penalization, but it could also irritate the examiner.<\/li>\n\n\n\n<li>When you present your result to the<strong> examiner<\/strong>, they will check <strong>both the burette reading and the color of the solution in the conical flask<\/strong>. If the solution appears darker than the expected light pink, they will know the reading has been manipulated. The correct amount of KMnO\u2084 cannot produce a darker solution if the concentrations of KMnO\u2084 and Mohr\u2019s salt are accurate.<\/li>\n\n\n\n<li><strong>If you make a mistake, repeat the entire experiment<\/strong>. Generally, board practical exams provide<strong> ample time to perform three repetitions, with extra time available if needed<\/strong>. Use this opportunity to carefully repeat the experiment and ensure that this time, you stop precisely when the solution reaches the endpoint and turns light pink.<\/li>\n<\/ul>\n\n\n\n<p>The Acid Base Titration with example Mohr&#8217;s Salt against KMnO4&nbsp;is a common experiment often asked in CBSE, ICSE and State board practical exams. <\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"frequently-asked-questions-faq-viva\">Frequently Asked Questions (FAQ)\/ VIVA<\/h2>\n\n\n<ol class=\"wp-block-list\">\n<li><strong>What is titration?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Titration is a laboratory technique used to determine the concentration of an unknown solution by reacting it with a solution of known concentration. It involves the gradual addition of a known solution to an unknown solution until the reaction reaches its endpoint.<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>What is the endpoint in titration?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>The endpoint is the point at which the reaction is complete. It is usually indicated by a color change in the solution when using an indicator or when a stable reading is observed in instrumental titrations.<\/p>\n\n\n\n<p>3. <strong>Why should titrations be performed drop by drop near the endpoint?<\/strong><\/p>\n\n\n\n<p>Adding too much titrant at once can overshoot the endpoint, leading to inaccurate results. Dispensing drop by drop ensures precise observation of the color change and prevents errors.<\/p>\n\n\n\n<p>4. <strong>Why do we remove air bubbles from the burette before titration?<\/strong><\/p>\n\n\n\n<p>Air bubbles in the burette nozzle can cause inaccurate readings, as they can lead to an incorrect volume of titrant being dispensed. Removing air ensures precise measurements.<\/p>\n\n\n\n<p>5. <strong>What is a standard solution in titration?<\/strong><\/p>\n\n\n\n<p>A <strong>standard solution<\/strong> is a solution with a precisely known concentration. It is used as the titrant to determine the unknown concentration of another solution.<\/p>\n\n\n\n<p>6. <strong>Why is sulfuric acid added in the titration of Mohr\u2019s salt with KMnO\u2084?<\/strong><\/p>\n\n\n\n<p>Sulfuric acid provides an acidic medium, which is necessary for the redox reaction between KMnO\u2084 and Mohr\u2019s salt to occur correctly. Without it, the reaction might not proceed efficiently.<\/p>\n\n\n\n<p class=\"has-text-align-center has-base-2-color has-contrast-background-color has-text-color has-background has-link-color wp-elements-35522f01b84d9ae435144edc92dc8fe7\"><strong><a href=\"https:\/\/wa.link\/23ivca\">If you are planning to set up or upgrade your school science lab,<mark style=\"background-color:rgba(0, 0, 0, 0);color:#403dd9\" class=\"has-inline-color\"> <\/mark>get in touch with our lab experts today!<\/a><\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Titration of Mohr&#8217;s Salt with KMnO4&nbsp;explained in detail with complete theory and procedure for Board Exams in India. Titration of Mohr&#8217;s Salt with KMnO4: Theory Potassium permanganate is a strong oxidant in the presence of sulfuric acid. Mohr salt is a double salt forming a single crystalline structure having the formula FeSO4.(NH4)2SO4.6H2O. The chemical name for Mohr\u2019s salt is ferrous ammonium sulfate. In this titration Mohr salt acts as a reducing agent and potassium permanganate acts as an oxidizing agent. Acid Base Titration with Mohr&#8217;s Salt against KMnO4&nbsp;is an example of redox reaction. In this redox reaction, ferrous ion from Mohr\u2019s salt gets oxidized and pink colored of manganese present in potassium permanganate, which is in the +7-oxidation state gets reduced to colorless Mn2+ state. The chemical reaction and the molecular chemical equation is given below. Reduction half reaction \u2013 2KMnO4 + 3H2SO4 \u2192 K2SO4 + 2MnSO4 + 3H2O + 5[O] Oxidation half reaction \u2013 [2FeSO4(NH4)2SO4.6H2O + H2SO4 + [O] \u2192 Fe2(SO4)3 + 2(NH4)2SO4 + 13H2O] x 5 Overall reaction \u2013 2KMnO4 + 10FeSO4(NH4)2SO4.6H2O+ 8H2SO4 \u2192 K2SO4+ 2MnSO4+ 5Fe2(SO4)3+ 10(NH4)2SO4+ 68H2O Titration of Mohr&#8217;s Salt with KMnO4: Apparatus We will need the following to perform Acid Base Titration with Mohr&#8217;s Salt Against KMnO4&nbsp;as an example: Burettes for Acid Base Titration Example Mohr&#8217;s Salt Against KMnO4 for Board Exam Practical by Labkafe LABKAFE provides all necessary apparatus for Chemistry practical exams for CBSE, ICSE, and all State Boards, along with compatible lab furniture. Browse our compact Chemistry Lab Packages (CBSE, ISC and State Boards) which includes every piece of equipment needed for your specific board exam practical. For any queries or requirements, get in touch with our lab experts today! FREE LAB CONSULTATION! Titration of Mohr&#8217;s Salt with KMnO4: Procedure Setup for Acid Base Titration example with Mohr&#8217;s Salt Against KMnO4&nbsp;(Image- Byju&#8217;s) Acid Base Titration with example Mohr&#8217;s Salt Against KMnO4&nbsp;is performed as follows: Titration of Mohr&#8217;s Salt with KMnO4: Calculation Normality of KMnO4 solution: Consider &#8220;y&#8221; ml of given KMnO4 solution is equivalent to 20 ml of N\/10 Mohr\u2019s salt solution. According to law of equivalents, N1V1 = N2V2 N1, N2 are normality of Mohr\u2019s salt and KMnO4 solution respectively. V1, V2 are volumes of Mohr\u2019s salt and KMnO4 respectively. 1\/10 x 20 = N2 x y N2 = 2\/y N = Normality of given KMnO4 solution = 2\/y Strength of KMnO4 solution: Strength = Normality x Equivalent mass Equivalent mass of KMnO4 = = 158\/5 = 31.6 = 2\/y x 31.6 g\/liter Molarity of KMnO4 solution: N = M x Number of electron gained N = M x 5 M = N\/5 moles\/ liter The strength of and molarity of a given KMnO4 solution is found out as 2\/y x 31.6 g\/l and N\/5 moles\/liter, respectively. Results and Discussion Molarity of given KMnO4 solution is _________ moles\/liter The strength of given potassium permanganate solution is _______ g\/L Precautions Beware of these traps if you don&#8217;t want to feel like this student during your practical exam. Acid Base Titration with example Mohr&#8217;s Salt Against KMnO4&nbsp;must be done with these secret tips in mind. This will give you an edge over other candidates. Beware of Mechanical Errors during Titration The Acid Base Titration with example Mohr&#8217;s Salt against KMnO4&nbsp;is a common experiment often asked in CBSE, ICSE and State board practical exams. Frequently Asked Questions (FAQ)\/ VIVA Titration is a laboratory technique used to determine the concentration of an unknown solution by reacting it with a solution of known concentration. It involves the gradual addition of a known solution to an unknown solution until the reaction reaches its endpoint. The endpoint is the point at which the reaction is complete. It is usually indicated by a color change in the solution when using an indicator or when a stable reading is observed in instrumental titrations. 3. Why should titrations be performed drop by drop near the endpoint? Adding too much titrant at once can overshoot the endpoint, leading to inaccurate results. Dispensing drop by drop ensures precise observation of the color change and prevents errors. 4. Why do we remove air bubbles from the burette before titration? Air bubbles in the burette nozzle can cause inaccurate readings, as they can lead to an incorrect volume of titrant being dispensed. Removing air ensures precise measurements. 5. What is a standard solution in titration? A standard solution is a solution with a precisely known concentration. It is used as the titrant to determine the unknown concentration of another solution. 6. Why is sulfuric acid added in the titration of Mohr\u2019s salt with KMnO\u2084? Sulfuric acid provides an acidic medium, which is necessary for the redox reaction between KMnO\u2084 and Mohr\u2019s salt to occur correctly. Without it, the reaction might not proceed efficiently. If you are planning to set up or upgrade your school science lab, get in touch with our lab experts today!<\/p>\n","protected":false},"author":13,"featured_media":1524,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[270],"ppma_author":[373],"class_list":["post-1515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chemistry","tag-acid-base-titration-example"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Titration of Mohr&#039;s Salt with KMnO4: Complete Procedure<\/title>\n<meta name=\"description\" content=\"Titration of Mohr&#039;s Salt with KMnO4 with complete concept, theory, apparatus and procedure for students. 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