The PK_a of HCl Is ?7 $\mathrm{HCl}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{\oplus}+\mathrm{Cl}^{\ominus}$

question 73

Multiple Choice

The pK_a of HCl is ?7. What is the value of the equilibrium constant, K_eq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M] $\mathrm{HCl}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{\oplus}+\mathrm{Cl}^{\ominus}$

• A) 1.8 × 10⁵
• B) 385
• C) 1.8 × 10?⁵
• D) ?1.8 × 10⁵

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