Question

500 mL solution of hydrochloric acid is made by dissolving 3.65 gram $HCl$ in distilled water.
What is the molarity of chloride ions in the solution?

• A. 0.01 M
• B. 0.02 M
• C. 0.2 M
• D. 0.1 M

Answer 1

The correct option is D 0.1 M

$Molarity=\frac{Weight}{GramAtomicweight}\times \frac{1000}{V\left(ml\right)}$

$⟹Molarity=\frac{3.65}{36.5}\times \frac{1000}{500}=0.2$

$⟹Molarity=0.2$

It is a homogeneous because $H^{+}$ and $C{l}^{-}$ are in $1:1$ ratio.

So Molarity of $C{l}^{-}$ ions $=\frac{0.2}{2}=0.1$