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The acid dissociation constant Ka of acetic acid HCH3CO2 is ×1.810−5. Calculate the pH of a 1.2M solution of acetic acid. Round your answer to 1 decimal place.

Question

The acid dissociation constant Ka of acetic acid HCH3CO2 is ×1.810−5. Calculate the pH of a 1.2M solution of acetic acid. Round your answer to 1 decimal place.

 

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Step 1

Acetic acid is weak acid and it dissociates partially into [CH3C...

CH3COOH CH,Co0 +H20*
CH,COOHO
Ка
[CH, COОH
As permole of acetic aciddissociates into 1:1 ratio,then CHCOOH20
x
x2
x2
Ka
1.2M
[сH, COон)
COOH
1.8x10-5x2
1.2M
solve for'x x4.7x10-3 M
[CHCO0H04.7103M
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CH3COOH CH,Co0 +H20* CH,COOHO Ка [CH, COОH As permole of acetic aciddissociates into 1:1 ratio,then CHCOOH20 x x2 x2 Ka 1.2M [сH, COон) COOH 1.8x10-5x2 1.2M solve for'x x4.7x10-3 M [CHCO0H04.7103M

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