Question

How much volume (in litre) of 3 M NaOH is obtained from 80 g NaOH? (Atomic mass of Na = 23 u)

• A. 2.67
• B. 1.34
• C. 0.67
• D. 0.33

Answer 1

Answer: (C)

Molarity $=\frac{\text{weight}}{\text{molecular}\text{weight }\times \text{ volume}\text{of}\text{solution}}$ $\Rightarrow$ $3M=\frac{80}{40\times V}$ $V=\frac{2}{3}=0.67L$