Some Basic Concepts Of Chemistry Question 48

Question: The impure 6 g of NaCl is dissolved in water and then treated with excess of silver nitrate solution. The mass of precipitate of silver chloride is found to be 14 g. The % purity of NaCl solution would be:

Options:

A) 95%

B) 85%

C) 75%

D) 65%

Show Answer

Answer:

Correct Answer: A

Solution:

[a] The reaction that takes place is NaCl+AgNO3AgCl+NaNO3

143.5 g of AgCl is produced from 58.5 g

14 g of AgCl will be produced from 58.5×14143.5=5.70g,NaCl This is the amount of NaCl in common salt; % purity =5706×100=95 %



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