Question

For $1$ molar solution of $NaCl$ in water at ${25}^o$C and $1$-atm pressure show that:

• A. Molarity $=$ mole fraction
• B. Molality $=$ mole fraction
• C. Normality $=$ mole fraction
• D. Molarity $=$ normality

Answer 1

The correct option is D Molarity $=$ normality

For $NaCl$,

As the charge on both sodium and chloride is 1.

.
Again, we know that Molarity$\times n$ factor $=$ Normality

For $NaCl$ 'n' factor is 1.

So, Molarity $=$ normality
($\because$ Equivalent weight $=$ Molecular weight).

Hence, option D is correct.