What is the concentration of H^+ ions in a 0.025 M HCl solution?

• A. 0.050 M
• B. 0.0125 M
• C. 0.0025 M
• D. 0.025 M

Answer: (D)

Verified step by step guidance

1. Recognize that HCl is a strong acid, which means it completely dissociates in water. Therefore, the concentration of H\textsuperscript{+} ions is equal to the initial concentration of HCl.
2. Write the dissociation equation for HCl: \(\mathrm{HCl} \rightarrow \mathrm{H}^+ + \mathrm{Cl}^-\).
3. Since the dissociation is complete, the concentration of \(\mathrm{H}^+\) ions is the same as the concentration of HCl, which is 0.025 M.
4. No further calculations are needed because the concentration of \(\mathrm{H}^+\) ions directly equals the molarity of the HCl solution.
5. Conclude that the concentration of \(\mathrm{H}^+\) ions in the 0.025 M HCl solution is 0.025 M.