To determine which acid is the strongest among the ones listed, we look at the pKa values. The lower the pKa, the stronger the acid. Here are the provided pKa values for each acid:
- HCHO2 (formic acid): pKa = 3.77
- H3BO3 (boric acid): pKa = 9.23
- HClO (hypochlorous acid): pKa = 7.46
- H2CO3 (carbonic acid): pKa = 6.37
Comparing these values, the lowest pKa is for HCHO2, which has a pKa of 3.77.
Therefore, the strongest acid among the given options is:
HCHO2 (formic acid).
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