Q. Excess of silver nitrate solution is added to 100 mL of 0.01 M pentaaqua chloro chromium (III) chloride solution. The mass of silver chloride obtained in grams is [Atomic mass of silver is 108].
A) $287 \times 10^{- 3}$
B) $143.5 \times 10^{- 3}$
C) $143.5 \times 10^{- 2}$
D) $287 \times 10^{- 2}$
Explanation
(a)
Number of moles of pentaaqua chloro chromium III chloride in the solution.
$n = \frac{0.01 \times 100}{1000}$=0.001
1 mole of $\left\lbrack Cr\left( H_{2}O \right)_{5}Cl \right\rbrack{Cl}_{2}\$gives 2 moles of chloride ions.
Moles of chloride ions =0.001 $\times$2=0.002
Mass of AgCl produced =0.002 $\times$143.5
=287.0$\times 10^{- 3}g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.