Level 3 Chem - Equilibrium in Aqueous Systems Formulae

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Chemistry

Equilibrium

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12 Terms

1
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pH

-log[H3O+]

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[H3O+]

10-pH

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Kw

1.00⨉10-14

[H3O+][OH-]

4
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pKa

-log(Ka)

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Ka

10-pKa

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[H3O+] in weak acid

√(Ka ⨉ [acid])

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[H3O+] in weak base

√((Ka ⨉ Kw)/[base])

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pH of buffer

pKa + log([base]/[acid])

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[H3O+] of buffer

Ka ⨉ [acid]/[base]

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Dilution factor

[Diluted] = [Original] ⨉ (original volume)/(total volume)

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c

n/v

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n

m/Mr