Question

Diluting concentrated 1.74M acetic acid to prepare 200 ml of 8M stick solution. What volume of concentrated acid must be used

Answer 1

Answer:

43.5 mL

Explanation:

We are given;

• Molarity of dilute acetic acid is 1.74 M
• Volume of the solution that needs to be prepared is 200 mL
• Molarity of the stock solution 8 M

We are required to determine the volume of acid that must be used.

• We need to know the dilution formula;
• According to the dilution equation;

M1V1 = M2V2

Rearranging the formula;

V1 = M2V2 ÷ M1

   = (1.74 M × 200 mL) ÷ 8 M

   = 43.5 mL

Therefore, the volume of the concentrated acid that must be added is 43.5 mL