Question

_____ is formed on dissolving phosphorus penta oxide in

water .
.​

Answer 1

Explanation:

Answer. It reacts with water to form phosphoric acid H3PO4. It is highly exothermic and leads to formation of fumes.

Answer 2

Required Answer:-

Phosphorus is a non-metal and the oxide, phosphorus pentoxide is a acidic oxide. After making its aqueous solution in water, it will react with water to form Hydrophosphoric acid (H3PO4)

The required reaction is:

• Phosphorus pentoxide + water gives Hydrophosphoric acid$.$

$\large{ \boxed{ \sf{2P_2O_5 + 6H_2O \longrightarrow \: 4H_3PO_4}}}$

Phosphorus pentoxide is a good dehydrating agent. It is acidic in nature and react with basic oxides or hydroxides. The above reaction gives dense fumes as well.