Question

What is the concentration of nitrate ions if equal-volumes of $0.1MAgN{O}_3$ and $0.1MNaCl$ are mixed together?

• A. 0.1 N
• B. 0.2 M
• C. 0.05 M
• D. 0.25 M

Answer 1

Answer: (C)

$AgN{O}_3(aq)+NaCl(aq)\to NaN{O}_3(aq)$ $+AgCl(s)$ $N{O}_3^{-}$ ions remain in the solution for $NaN{O}_3$ is soluble in water. If V mL each of the two solution be mixed, the volume of the resulting solution $=2V$ Then $0.1\times V=M_2\times 2V$ $M_2=\frac{0.1}{2}=0.05$