Question

If 98 grams of $H_2{SO}_4$ is added in sufficient water to make 500 milliliters of solution, then what is the molarity of a solution?

• A. $1$
• B. $2$
  
• C. $0.5$
  
• D. $3$

Answer 1

The correct option is B $2$

Molar mass of $H_{2}S{O}_4=98g/mol$

Number of moles of $H_{2}S{O}_4=\frac{\text{mass}}{\text{molar mass}}=\frac{98}{98}=1$

Volume of solution $=500mL=0.5L$

$(\because \text{1 L = 1000 mL)}$

Molarity is the number of moles of $H_{2}S{O}_4$ to the volume of solution present in L.

Molarity $=\frac{1}{0.5}=2M$

Hence, option B is correct.