Question

A lotions of 5% methyl salicylate is to be prepared for o patient with allergic dermatitis . What amount of a 10% methyl salicylate lotion is needed to prepare 240mL

Answer 1

To create a 5% methyl salicylate lotion from a 10% solution, 120 mL of the 10% lotion is needed to prepare 240 mL of the final product using a dilution calculation.

Step-by-step explanation:

The student is asking about diluting a solution to make a new concentration. This problem involves a simple calculation commonly used in Chemistry or Pharmacy practice known as dilution. Dilution is the process of reducing the concentration of a solute in a solution, usually simply by mixing with more solvent.

To prepare a 5% methyl salicylate lotion from a 10% methyl salicylate lotion, you would use the dilution formula:

C1 x V1 = C2 x V2

Where C1 is the initial concentration, V1 is the volume of the initial concentration you need, C2 is the final concentration, and V2 is the final volume you want to have.

For this case:

• C1 = 10%
• C2 = 5%
• V2 = 240mL

We want to find V1, which is the amount of the 10% lotion we need. Rearrange the formula:

V1 = (C2 x V2) / C1

Plugging in the numbers:

V1 = (5% x 240mL) / 10%

V1 = 120 mL

So, 120 mL of the 10% lotion is required to prepare 240 mL of a 5% lotion.