A 5.82 g silver coin is dissolved in nitric acid. When sodium chloride is added to the solution, all the silver gets precipitated as AgCl. The mass of the precipitated silver chloride is 7.2 g. The percentage of silver in the coin is :

Options

A. 0.603
B. `80%`
C. `93.1%`
D. `70%`

Answer

C

Explanation

143.5 g of AgCl contain Ag = 108 g
Amount of Ag in 7.20 g of AgCl `=108/143.5 xx 7.20 = 5.42`g
% of Ag `=(5.42)/5.82 xx 100 = 93.1%`