Hydrosulfuric Acid Is a Diprotic Acid, for Which K_a1 =

question 19

Multiple Choice

Hydrosulfuric acid is a diprotic acid, for which K_a1 = 5.7 * 10^-8 and K_a2 = 1 * 10^-19. Determine the concentration of sulfide ion in a 0.10 M hydrosulfuric solution.

• A) 0.10 M
• B) 7.5 * 10^-5 M
• C) 5.7 * 10^-9 M
• D) 1 * 10^-19 M
• E) 1 * 10^-20 M

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