Question

35.0 mL of 12.0 M HCl is added to enough water to have a final volume of 1.20 L. What is the molarity of the final solution?

Answer 1

Answer:

0.35 M

Explanation:

We are given;

• Initial volume as 35.0 mL or 0.035 L
• Initial molarity as 12.0 M
• Final volume is 1.20 L

We are required to determine the final molarity of the solution;

• Dilution involves adding solvent to a solution to make it more dilute which reduces the concentration and increases the solvent while maintaining solute constant.

• Using dilution formula we can determine the final molarity.

M1V1 = M2V2

• Rearranging the formula;

M2 = M1V1 ÷ V2

     = (12.0 M × 0.035 L) ÷ 1.2 L

      = 0.35 M

Thus, the final concentration of the solution is 0.35 M