Difference between revisions of "2023 AMC 10A Problems/Problem 25"

Latest revision as of 23:07, 9 November 2023

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+#redirect[[2023 AMC 12A Problems/Problem 21]]
-. Let HA represent a weak monoprotic acid with
-Ka = 1.0×10−5. In an experiment, a 50.0 mL
-sample of 0.10 mol L−1 HA(aq) is titrated with
-.10 mol L−1 NaOH(aq). At which point during the
-titration are the equilibrium concentrations of H+
-and OH− equal?
-A after the addition of exactly 25.0 mL of NaOH(aq)
-B after the addition of slightly less than 50.0 mL of
-NaOH(aq)
-C after the addition of exactly 50.0 mL of NaOH(aq)
-D after the addition of more than 50.0 mL of
-NaOH(aq)
-E The equilibrium concentrations of H+ and OH− are
-never equal.
--Kaisssssgao