Some Basic Concepts Of Chemistry Question 86

Question: When 2.5 g of a. sample of Mohr’s salt reacts N completely with 50 mL of N10KMnO4 solution. The % purity of the sample of Mohr’s salt is:

Options:

A) 78.4

B) 70

C) 37

D) 40

Show Answer

Answer:

Correct Answer: A

Solution:

[a] m-eq. FeSO4(NH4)4SO4.6H2O =meq.of,KMnO4 (n=l) W392×1×1000=0.1×50 Hence, % purity of Mohr’s salt =1.962.5×100=78.4

W=1.96g



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