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= 1/ 40
= 0,025 mol
NaOH + CH₂COOH ---> CH₃COONa + H₂O
M: 0,025 0,050
R: -0,025 - 0,025 +0,025
S: - 0,025 0,025
Penyangga:
[H⁺] = Ka x mol asam/mol garam
= 10⁻⁵ x 0,025/0,025
= 7x10⁻⁵ M
pH = - log 10⁻⁵
= 5
14) HCl + NH₃ ----> NH₄Cl
M: 0,1 V 0,1 x 2 V
R: 0,1V 0,1V 0,1 V
S: - 0,1 x 1V 0,1 V
pH = 9 ---> pOH = 5 --> [OH⁻] = 10⁻⁵
[OH⁻] = Kb mol basa/mol garam
10⁻⁵ = 10⁻⁵ mol basa/mol garam
b/g = 1
Jadi perbandingan Volume NH₃ : Volume HCl = 2 : 1