Problem: Calculate the molarity of a solution prepared by dissolving 12.5 g of Na2CrO4 in enough water to produce a solution with a volume of 750. mL .

We are being asked to calculate the molarity of a solution prepared by dissolving 12.5 g of Na₂CrO₄ in enough water to produce a solution with a volume of 750 mL .

Recall that molarity is given by

$\boxed{\mathbf{molarity}\mathbf{ }\mathbf{=}\mathbf{ }\frac{\mathbf{moles}\mathbf{ }\mathbf{of}\mathbf{ }\mathbf{solute}}{\mathbf{Liters}\mathbf{ }\mathbf{of}\mathbf{ }\mathbf{solution}}}$

We are going to do the following steps:

Step 1: Determine the moles of solute

Step 2: Determine the Liters of solution

Step 3: Determine the molarity of the solution