Question

What volume of water should be added to 20 mL of a 0.6 M HCl solution if a 0.1 M solution is needed for the lab experiment

Answer 1

Step-by-step explanation:

To obtain a 0.1 M HCl solution from a 0.6 M HCl solution, the concentration of the original solution must be diluted. To dilute the solution, water is added.

The dilution formula is: C1 * V1 = C2 * V2, where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Knowing the desired final concentration (C2 = 0.1 M) and volume (V2 = 20 mL), the initial concentration (C1 = 0.6 M) and volume (V1) can be calculated as follows:

0.1 * 20 = 0.6 * V1

Solving for V1:

V1 = 20 * 0.1 / 0.6

V1 = 3.33 mL

So, the volume of water that should be added to 20 mL of 0.6 M HCl to obtain a 0.1 M solution is 20 - 3.33 = 16.67 mL.