Question

80M stock Sodium chloride solution was provided to you. If you need to prepare 40 ml of the 10M sodium chloride solution, how will you prepare using the below formula?

Use the formula C1V1 = C2V2.

Answer 1

To prepare the 10M sodium chloride solution, you will need to add 320ml of the 80M stock solution to the desired volume.

Step-by-step explanation:

To prepare the 10M sodium chloride solution, we will use the formula C1V1 = C2V2. In this case, the initial concentration (C1) is 80M, and the initial volume (V1) is 40ml. The desired concentration (C2) is 10M, and the desired volume (V2) is unknown. We can rearrange the formula to solve for V2, which is the volume needed to prepare the desired solution.

Using the formula, we have:

C1V1 = C2V2

(80M)(40ml) = (10M)(V2)

3200 = 10V2

V2 = 3200/10 = 320ml

The volume needed to prepare the 10M sodium chloride solution is 320ml.