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Hz is a weak acid. an aqueous solution of hz is prepared by dissolving 0.020 mol of hz in sufficient water to yield 1.0 l of solution. the ph of the solution was 4.93 at 25.0 °c. the ka of hz is hz is a weak acid. an aqueous solution of hz is prepared by dissolving 0.020 mol of hz in sufficient water to yield 1.0 l of solution. the ph of the solution was 4.93 at 25.0 °c. the ka of hz is 1.4 ⋅ 10-10 1.2 ⋅ 10-5 2.8 ⋅ 10-12 9.9 ⋅ 10-2 6.9 ⋅ 10-9
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