Question

Select the correct answer from each drop-down menu. To prepare a 2 M solution of potassium nitrate (KNO3), which quantities must be measured? The mass of the and the volume of the must be measured.

Answer 1

Molarity determines the molar concentration of the solute dissolved in the solution. Mass and volume should be measured for the estimation of the molarity.

What is molarity?

Molarity is the mass of the solute present in the litre of solution. It is also called molar concentration as it estimates the concentration of the compounds.

The unit of molarity is mol/L and can be given by the formula:

$\rm Molarity(M) = \rm \dfrac{ \text{Mass of solute}}{\text{Molar mass of solute}}\times \text{Volume of Solution in L}$

Therefore, for the formation of a 2M potassium nitrate solution, the volume of the solution and mass of the solute is required.

Learn more about mass and volume here:

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