Question

Two solutions of a substances (non electrolyte) are mixed in the following manner. 480 ml of `1.5M` first solution `+520 mL` of `1.2M` second solution. What is the molarity of the final mixture?
A. `1.20M`
B. `1.50M`
C. `1.344M`
D. `2.70M`

Answer 1

Correct Answer - C
Total milimoles of solute `=480xx1.5+520xx1.2=720+624=1344`.
Total volume `=480+520=1000`.
Molarity of the final mixture `=(1344)/(1000)=1.344M`.