Question

What is the concentration of ammonium ions in a $0.25M$ solution of ammonium chloride?

• A. $0.13M$
• B. $0.25M$
• C. $0.50M$
• D. $0.75M$
• E. $1.00M$

Answer 1

Answer: (B)

$0.25M$

The concentration of ammonium ions in a 0.25 M solution of ammonium chloride is $0.25M$.
$N{H}_{4}Cl\to N{H}_4^{+}+C{l}^{-}$
Ammonium chloride is a salt. It is a strong electrolyte. Hence, $\left[N{H}_4^{+}\right]=\left[N{H}_{4}Cl\right]=0.25$ $M$.