calculate what volume of the acid must be taken from the stock solution?

Answer 1

To calculate the volume of the acid that must be taken from the stock solution, we can use the formula:

V1M1 = V2M2

where V1 is the volume of the acid to be taken from the stock solution, M1 is the molarity of the stock solution, V2 is the desired volume of the final solution, and M2 is the desired molarity of the final solution.

Let's assume that we want to prepare 500 mL of a 1.5 M HCl solution from a stock solution of 12 M HCl. Using the formula above, we get:

V1(12 M) = (500 mL)(1.5 M)

V1 = (500 mL)(1.5 M) / (12 M)

V1 = 62.5 mL

Therefore, we need to take 62.5 mL of the stock solution and dilute it to a final volume of 500 mL to prepare 500 mL of a 1.5 M HCl solution.