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Ka of 2-germaacetic acid (GeH3COOH)

by 영원파란 2015. 10. 21.

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Ka of 2-germaacetic acid (GeH3COOH)

 

 

The compound 2-germaacetic acid (GeH3COOH), is an unstable weak acid derived structurally from acetic acid (CH3COOH) by having a germanium atom replace the methyl carbon atom. At 25, a 0.050 M solution of 2-germaacetic acid has a pH of 2.42. Calculate the Ka of 2-germaacetic acid.

 

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pH = -log[H+] = 2.42

[H+] = 10^(-2.42) = 0.00380 M

 

.....................HA(aq) H+(aq) + A-(aq)

평형에서..........C-x..........x............x

 

Ka = [H+][A-] / [HA]

= (x)(x) / (C-x)

= (0.00380)^2 / (0.050 - 0.00380) = 3.1×10^-4

 

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