Chem 116 Set 13: pH of Salt Solutions
116_PSV_13_salt_hydrolysis_1
Sodium acetate (CH3COONa) has applications in photographic development and textile dyeing. What
is the pH of 0.25 M sodium acetate? KA of CH3COOH is 1.8×10−5.
pH = 9.07
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Chem 116 Set 13: pH of Salt Solutions
116_PSV_13_salt_hydrolysis_2
Predict whether the following salt solution is neutral, acidic, or basic. Calculate the pH.
Hint: Write the equation for dissociation of the salt and any equilibrium established.
0.10 M AlCl3; KA of Al(H2O)63+ = 1.4×10−5
pH=2.93
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Chem 116 Set 13: pH of Salt Solutions
116_PSV_13_salt_hydrolysis_3
Predict whether the following salt solutions are neutral, acidic, or basic, and calculate the pH of each.
Hint: Write the equation for dissociation of the salt and any equilibrium established.
0.25 M NH4Br; KB of NH3 = 1.8×10−5
0.10 M NaCN;
0.20 M NaNO2;
−10
pH=4.93
KA of HCN = 4.9×10
KA of HNO2 = 4.6×10−4
pH=11.15
pH= 8.32
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