Question

What is the molarity of $2.00g$ of $NaOH$ dissolved in a total solution volume of $250mL$?

• A. $0.2M$
• B. $0.5M$
• C. $0.008M$
• D. $252M$

Answer 1

Answer: (A)

$0.2M$

Molarity of NaOH $=\frac{\text{Mass of NaOH}}{\text{Molar mass of NaOH}}\times \frac{1000}{\text{V (in mL)}}=\frac{2}{40}\times \frac{1000}{250}=0.2M$