Question

5g of pyrolusite (impure MnO2) was heated with conc. HCl and Cl2 evolved was passed through excess of KI solution. The iodine liberated required 40 ml of N/10 hypo solution. Find the % of MnO2in the pyrolusite.​

Answer 1

Answer:

Explanation:

equivalent of i2 = 4

equivalent of pyrolusite = 4

moles*f*1000=  4

moles*2000=4

moles = 0.002

weight = 0.174

percentage = 0.174/5 *100

=3.48

Answer 2

Answer:

Pls Find answer in the attachment