Question

A solution with density 1 g/cm^3 has 98 grams of H2SO4 in 402 grams of water, what is the concentration of solution?

(a) 1 molar

(b) 2 molar

(c) 3 molar

(d) 4 molar

This question was posed to me during an internship interview.

My question is taken from Concentration in section Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

The correct choice is (b) 2 molar

The best I can explain: Moles of H2SO4 = 98/98 = 1, => concentration of solution = 1/(500/1) = 2*10^-6 mole/cm^3 = 2 molar.