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Q The pH of a solution of hydrochloric acid is 4. What is the molarity of the solution?

A. 0.4

B. 0.0001

C. 0.04

D. 4.0

Explanation

Correct Answer is B. 0.0001 Explanation The molarity of a solution is a measure of the concentration of a solute in a solution. In this case, the pH of the solution is given as 4, which indicates that the concentration of H+ ions in the solution is 10^-4 M. Since hydrochloric acid (HCl) is a strong acid that dissociates completely in water, the concentration of HCl in the solution is also 10^-4 M. Therefore, the molarity of the solution is 0.0001 M.

A. 0.4

B. 0.0001

C. 0.04

D. 4.0

Explanation

Correct Answer is B. 0.0001 Explanation The molarity of a solution is a measure of the concentration of a solute in a solution. In this case, the pH of the solution is given as 4, which indicates that the concentration of H+ ions in the solution is 10^-4 M. Since hydrochloric acid (HCl) is a strong acid that dissociates completely in water, the concentration of HCl in the solution is also 10^-4 M. Therefore, the molarity of the solution is 0.0001 M.