Question

Find the molarity of the Cl${}^{-}$ ion in the resulting solution form by mixing 500ml of 1M NaCl and 500ml 1M HNO${}_3$.

• A. $0.5M$
• B. $0.8M$
• C. $0.4M$
• D. $1M$

Answer 1

The correct option is A $0.5M$

Given that,

Volume of NaCl, $V_1=$ 500 ml

Volume of HNO${}_3$, $V_2=$ 500 ml

Total volume, $V=$ 1000 ml

Now,

Molarity of Cl${}^{-}$ ion $=\frac{M_1\times V_1}{V}=\frac{1\times 500}{1000}=0.5M$