CHEMISTRY COMMUNITY

A solution is prepared by dissolving 55.1g of KCl in approx 75mL water and then adding water to a final volume of 125mL. What is the molarity of Kcl (aq) in this solution?

The 75 mL is not important; it determines an intermediate concentration. Convert the grams of KCl to moles and divide by the final volume.

you should use the formula n=m/M for the moles of kcl; and then you should use the formula molarity=n/v . the first 75ml here is just useless. you only need the final volume.