Question

Molarity of a solution containing $1gNaOH$ in $250ml$ of solution is

• A. $0.1M$
• B. $1M$
• C. $0.01M$
• D. $0.001M$

Answer 1

The correct option is A $0.1M$

$\text{Mass of NaOH (m) = 1g}$

$\text{The volume of water (V) = 250 ml}$

$\text{Mol. wt of NaOH (m) = 40g/mol}$

$Molarity\left(M\right)=\frac{m\times 1000}{M\times V\left(ml\right)}$

$Molarity\left(M\right)=\frac{1\times 1000}{40\times 250}$

$M=0.1M$

$\text{Hence, the correct optio.n is A}$