The formula for a buffer solution contains 1.24% w/v of boric acid. How many milliliters of a 5% w/v boric acid solution should be used to obtain the boric acid needed in preparing 1 L of the buffer solution

248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

Explanation:

We can calculate the volume of the 5% w/v boric acid solution needed to prepare the buffer solution 1.24% w/v using the following equation:

Where:

: is the concentration of the initial solution = 5% w/v

: is the concentration of the final solution = 1.24% w/v

: is the volume of the initial solution =?

: is the volume of the final solution = 1 L

Hence, the volume of the 5% solution is:

Therefore, 248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

I hope it helps you!