Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to be more acidic in aqueous solution than H2S, e. g. have a larger Ka.

Question

Chemistry

Kevin Pittman

6 December, 15:33

Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to be more acidic in aqueous solution than H2S, e. g. have a larger Ka.

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Answers (1)

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Alisha Ray · Answer 1

H₂Se

Explanation:

A way of estimating the acidity of a weak acid is by analizing the stability of the formed anion. In this case, we should find a Group 6A element that in its anionic forms (HX⁻ and X⁻²) is more stable than HS⁻ and S⁻², thus it would be more acidic in aqueous solution.

The anionic forms of Se are more stable than the forms of S, similarly to how Br⁻ is more stable than Cl⁻.