Consider an aqueous solution in and in (). What is the total in the solution? — Ionic Equilibrium Chemistry Question
Question
Consider an aqueous solution $0.1 \text{ M }$ in $HCl$ and $0.1 \text{ M }$ in $CH_3COOH$ ($K_a = 1.8 \times 10^{-5}$). What is the total $[H^+]$ in the solution?
Answer: B
💡 Solution & Explanation
Due to the common ion effect, the strong acid ($HCl$) completely suppresses the dissociation of the weak acid ($CH_3COOH$). Thus, total $[H^+] \approx [HCl] = 0.1 \text{ M}$.
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