Question

Estimation of water of crystallisation in mohr salt by titrating with kmno4

Answer 1

Answer:

Determine the equivalent mass and number of molecules of water of crystallisation in a sample of Mohr's salt FeSO4 (NH4)2 SO4. nH20. Provided N/20 KMnO. Normality of ferrous ammonium sulphate can be determined by directly titrating it against standard (N/20) KMnO4 solution.

Answer 2

Answer:

Explanation:

Mass of Mohr's salt = 392 g / mol.

• To prepare an M/20 solution of Mohr's salt and use this solution, find the molarity of the given potassium permanganate (KMnO4) solution.

• Principle - Redox titrations are those titrations in which a reducing agent is titrated against an oxidizing agent or an oxidizing agent is titrated against a reducing agent.
• Mohr's salt titration with potassium permanganate is also a redox titration.
• In this titration, Mohr's salt acts as a reducing agent and potassium permanganate acts as an oxidizing agent.
• • So, the reaction between Mohr's salt and KMnO4 is a redox reaction in which oxidation and reduction occur simultaneously. Potassium permanganate acts as an oxidizing agent in all mediums such as neutral, acidic and basic
• But it acts as the strongest oxidizing agent in acidic medium, so a small amount of dilute sulfuric acid is added to the conical flask before adding Mohr's salt for titration.
• Molarity = mole of solute / liter of solution.
• as well.  M1 x V1 = M2 x V2
• The molarity can be calculated by entering the values ​​in the above formula.
• The Water of crystallization is the number of water molecules attached to the compound.
• It is stoichiometrically bound to the compound.