Question

The concentration of a solution of potassium hydroxide is determined by titration with nitricacid. A 30.0 mL sample of KOH is neutralized by 42.7 mL of 0.498 M HNO3. What is theconcentration of the potassiumhydroxide solution?

Answer 1

For this question, we can use the titration formula, which is the following:

MaVa = MbVb

We have:

Ma = 0.498 M

Va = 42.7 mL

Mb = ?

Vb = 30.0 mL

Now we can add these values into the formula:

0.498 * 42.7 = Mb * 30

21.26 = 30Mb

Mb = 0.709 M is the concentration of KOH