Rank the solutions in order of decreasing H30 Rank solutions from largest to smallest hydronium ion...

Question

Question

Rank the solutions in order of decreasing H30 Rank solutions from largest to smallest hydronium ion concentration. To rank it

Answer 1

Answer #1

To solve this, we need Ka values for the weak acids.

Among the given acids, HBr is a strong acid. So, [H₃O⁺] is highest among four.

Ka for HC₂H₃O₂ = 1.8 × 10^–5

Ka for HCN = 6.2 × 10^–10

Ka for HClO₂ = 1.1 × 10^–2

Ka is the acid dissociation constant of a weak acid. Larger the Ka value, stronger the acid and hence Larger the conc. of H₃O⁺

Hence the order of Hydronium ion concentration is

0.1 M HBr > 0.1 M HClO₂ > 0.1 M HC₂H₃O₂ > 0.1 M HCN

Answer 2

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