Question

question
what is the name for the acid with the formula $h_3po_5$?
answer
hypophosphoric acid
phosphoric acid
perphosphoric acid
perphosphorous acid
i dont know yet

Explanation:

Phosphorus-containing oxyacids are named based on the oxidation state of phosphorus. For $\ce{H3PO5}$, the oxidation state of P is +7, which is the highest possible for phosphorus. The prefix "per-" is used for oxyacids where the central atom is in its highest oxidation state, and the "-ic" suffix corresponds to the highest common oxidation state for phosphorus-containing acids. Hypophosphoric acid is $\ce{H4P2O6}$, phosphoric acid is $\ce{H3PO4}$, and perphosphorous acid does not match the given formula or standard naming.

Answer:

Perphosphoric acid