Question

What is the molarity of $H_2SO_4$ solution that has a density of 1.84 g/cc at 35$^\circ$C and contains 98% by weight ?

• A. 4.18 M
• B. 8.14 M
• C. 18.4 M
• D. 18 M

Answer 1

Answer: (C)

18.4 M

Answer 2

Molarity $=\frac{(\% w / w) \times \text { density } \times 10}{\text { Molar mass of solute }}$
$=\frac{9.8 \times 1.84 \times 10}{98}=18.4 \,M$