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Is ethanethiol or dimethylammonium a stronger Bronsted acid?

Is ethanethiol or dimethylammonium a stronger Bronsted acid?

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Answer #1

Bronsted acid: Proton donor is called as bronsted acid.

Strong acid has higher Ka value and lower pKa value.

Weak acid has lower Ka value and higher pKa value.

The pKa value of ethanethio (CH3CH2-SH) is 10.6

The pKa value of dimethyl ammonium ((CH3)2NH2+) is 10.7

Stronger acid has lower pKa value.

Hence the stronger acid is ethanethiol

Note: these pKa values are taken from wikipedia

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