Multiple Choice
What is the theoretical pH of a 0.1 M solution of sodium acetate (NaC2H3O2), a weak base?
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17. Acid and Base Equilibrium
pH of Weak Bases
Multiple Choice
What is the pH of an aqueous ammonia solution if its pOH is 3.20?
A
7.00
B
3.20
C
14.00
D
10.80
Verified step by step guidance1
Recall the relationship between pH and pOH in aqueous solutions at 25°C, which is given by the equation: \(\mathrm{pH} + \mathrm{pOH} = 14.00\).
Identify the given value in the problem, which is the pOH of the ammonia solution: \(\mathrm{pOH} = 3.20\).
Substitute the given pOH value into the equation to find the pH: \(\mathrm{pH} = 14.00 - \mathrm{pOH}\).
Perform the subtraction to express the pH in terms of the given pOH: \(\mathrm{pH} = 14.00 - 3.20\).
Interpret the result as the pH of the ammonia solution, which indicates the basicity of the solution since ammonia is a weak base.
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