Question

g You need a 60% alcohol solution. On hand, you have a 55 mL of a 5% alcohol mixture. You also have 65% alcohol mixture. How much of the 65% mixture will you need to add to obtain the desired solution

Answer 1

To determine how much of the 65% alcohol mixture you need to add to the 5% alcohol mixture to obtain a 60% alcohol solution, you can use the following formula:

C1V1 + C2V2 = C3V3

where C1 and V1 are the concentration and volume of the 5% alcohol mixture, C2 and V2 are the concentration and volume of the 65% alcohol mixture, and C3 and V3 are the concentration and volume of the final 60% alcohol solution.

Substituting the given values into the formula, we get:

0.05 x 55 mL + 0.65V2 = 0.6 x (55 mL + V2)

Simplifying and solving for V2, we get:

V2 = 8.33 mL

Therefore, you need to add 8.33 mL of the 65% alcohol mixture to the 5% alcohol mixture to obtain a 60% alcohol solution.