Question

________ number reagents listed below could be added to water to make 0.1 M solution of $C{l}^{-}$ ion?

i. $N{H}_3$ ii. $N{H}_{4}Cl$
iii. $C{H}_{3}COOH$ iv. $C{H}_{3}COONa$
v. $HCl$ vi. $NaCl$

Answer 1

The reagents ii. $N{H}_{4}Cl$ , v. $HCl$ and vi. $NaCl$ could be added to water to make 0.1 M solutions of $C{l}^{⊝}$
Strong electrolytes completely dissociate into the solution and 0.1 M solution of strong electrolytes corresponds to 0.1 M solution of constituent ions (if cations and anions are in the ration 1:1). For weak electrolytes which undergo partial dissociation, the degree of dissociation should be considered.

Hence, the correct answer is $3$