Problem: What is [H3O+] in a solution of 0.075 M HNO 2 and 0.030 M NaNO 2?HNO2(aq) + H2 O(l) ⇌ H3 O+(aq) + NO2 −(aq)    Ka = 4.5 × 10−5

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What is [H3O+] in a solution of 0.075 M HNO 2 and 0.030 M NaNO 2?
HNO2(aq) + H2 O(l) ⇌ H3 O+(aq) + NO2 (aq)    Ka = 4.5 × 10−5

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