How many grams of potassium carbonate are needed to make {eq}0.200\ L {/eq} of a {eq}2.50\ M {/eq} solution?

Question:

How many grams of potassium carbonate are needed to make {eq}0.200\ L {/eq} of a {eq}2.50\ M {/eq} solution?

Solution Preparation:

To prepare a solution, we must first know the desired volume and concentration. With this, we must make use of the molar mass in order to correctly determine how much of the reagent must be weighed. We use the molar mass in order to determine the mass from the required number of moles we must have.