What is the pH of a 1.35x10^(-2)M solution of potassium sulfate?

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What is the pH of a 1.35x10^(-2)M solution of potassium sulfate?

2006-10-24 04:24:21 · 3 answers · asked by Howard 1 in Science & Mathematics ➔ Chemistry

3 answers

Sulphuric acid is diprotic.
Both Ka1 and Ka2 are big enough to consider SO4(-2) as coming from a strong acid and not to worry about hydrolysis.
If you really want to be exact, pKa2=1.99 so you would have pH=7.06.

2006-10-24 07:45:54 · answer #1 · answered by bellerophon 6 · 0⤊ 0⤋

The solution of potassium sulfate (K2SO4) should have a neutral pH, since K+ is the cation of a strong base and SO42- is the anion of a strong acid.

2006-10-24 04:43:15 · answer #2 · answered by Dub 2 · 0⤊ 0⤋

It would be approximately 7, since both K and SO4 are strong ions.

2006-10-24 04:50:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋