Question

You need 50 mL of a 10% boric acid solution. The pharmacy carries only85% boric acid.

How much concentrate will you need?

Answer 1

Step-by-step explanation:

To determine how much 85% boric acid concentrate you need to make 50 mL of a 10% boric acid solution, you can use the following formula:

concentrate needed (mL) = desired concentration * volume / desired strength

Plugging in the given values, you get:

concentrate needed (mL) = 10% * 50 mL / 85%

Simplifying, you get:

concentrate needed (mL) = 0.12 mL

So, you will need about 0.12 mL of 85% boric acid concentrate to make 50 mL of a 10% boric acid solution.