# A 3.0 L solution contains 73.5 g of H_2SO_4. What is the molar concentration of the solution?

Approx. $0.250 \cdot m o l \cdot {L}^{-} 1$.
$\text{Concentration} = \frac{\frac{73.5 \cdot g}{98.08 \cdot g \cdot m o {l}^{-} 1}}{3.0 \cdot L} = 0.250 \cdot m o l \cdot {L}^{-} 1$
The concentration is quoted with respect to ${H}_{2} S {O}_{4} \left(a q\right)$. What is the concentration with respect to ${H}_{3} {O}^{+}$, and why do I make this distinction?