pH equations ceutics

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Last updated 5:36 PM on 9/17/26
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8 Terms

1
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[H+]=

Antilog(-pH) or 10^-pH

2
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Pkw =

pH + pOH = 14

pKa + pKb = 14

3
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Kw =

Ka Kb = 10^-14

4
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Weak acid pH (salt of weak base and strong acid)

pH = ½ pKa - ½ log [C]

5
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HH weak acid pH + acid buffer (weak acid plus conj base)

pH = pKa + log [salt]/[acid] or [A-]/[HA] or [ionized]/[unionized]

6
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Weak base pH + salt of weak acid/ strong base

pH = ½ pKw + ½ pKa + ½ log [C]

7
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HH weak base + basic buffer (weak base/conj acid)

pH = pKa + log[base]/[salt] or [B]/[BH+] or [unionized]/[ionized]

8
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[C]

(g/L)/ molar weight (g/mol)