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Calculate Ka of acetic acid from equilib...

Calculate Ka of acetic acid from equilibrium concentration given below:
`[H_(3)O^(+)]=[CH_(3)COO^(-)]=1.34xx10^(-3)M, [CH_(3)COOH]=9.866xx10^(-2)M`

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`K_(a)=([CH_(3)COO^(-)][H_(3)O^(+)])/([CH_(3)COOH])`
`[H_(3)O^(+)]=[CH_(3)COO^(-)]=1.34xx10^(-3)`
`[CH_(3)COOH]=9.866xx10^(-2)M`
Substituting these values
`K_(a)=([1.34xx10^(-3)][1.34xx10^(-3)])/([9.866xx10^(-2)])=1.82xx10^(-5)`
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