Assuming the compound is dissolved in water, what is the formula for phosphorous acid?
Answer
A
cap h sub 3 PO sub 4
B
cap h sub 3 PO sub 3
C
cap h sub 3 cap p
D
HP
Explanation
Phosphorous acid has the formula H₃PO₃. The “-ous” acid name corresponds to the lower-oxygen oxyacid, while phosphoric acid is H₃PO₄, so choice C is correct.
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