If you wanted to use 500 mL of a 0.1 Molar solution of a chemical for an experiment, and you only had a 0.5 Molar solution available, what could you do in order to get the solution that you wanted?

The answer to your question is given below.

Explanation:

To obtain the desired solution needed, we must obtain the volume of the stock solution required to prepare the solution. This is illustrated below:

Step 1:

Data obtained from the question include the following:

Volume of stock solution needed (V1) = ... ?

Molarity of stock solution (M1) = 0.5M

Volume of diluted solution (V2) = 500mL

Molarity of diluted solution (M2) = 0.1M

Step 2:

Determination of the volume of the stock solution needed.

This can be obtained by using the dilution formula as shown below:

M1V1 = M2V2

0.5 x V1 = 0.1 x 500

Divide both side by 0.5

V1 = (0.1 x 500) / 0.5

V1 = 100mL

Therefore, to obtain the desired solution, measure 100mL of the 0.5M stock solution and dilute with water to the mark.