Problem: What is the pH of a buffer that is 0.6 M HF and 0.2 M NaF? The Ka of HF is 6.8 × 10−4.a. 3.65b. 2.69c. 3.17d. 3.50
FREE Expert Solution
We have to calculate the pH of a buffer that is 0.6 M HF and 0.2 M NaF.
HF is a weak acid which dissociates partially in an aqueous solution to produce H3O+ and F- ions.
HF(aq) + H2O(l)⇌ F−(aq) + H3O+(aq)
The fluoride ion (F-) produced as a result of HF dissociation is the conjugate base of HF.
We will use the Henderson-Hasselbalch equation to solve this problem.
Problem Details
What is the pH of a buffer that is 0.6 M HF and 0.2 M NaF? The Ka of HF is 6.8 × 10−4.
a. 3.65
b. 2.69
c. 3.17
d. 3.50
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