What substances will phosphoric acid react with: 1) Na2O 2) P2O5 3) HNO3 4) KOH 5) Na

Let us determine with which of these compounds orthophosphoric acid reacts.
1. Reacts with potassium hydroxide.
H3PO4 + 3KOH = K3PO4 + 3H2O.
This reaction is called an exchange reaction. As a result, potassium phosphate and water compounds are formed.
2. Reacts with sodium hydroxide.
3Na2O + 2H3PO4 = 2 Na3PO4 + 3H2O.
This reaction is called an exchange reaction. As a result, a compound of sodium phosphate and water is formed.
3. Reacts with sodium.
6Na + 2H3PO4 = 2Na3PO4 + 3H2.
This reaction is called a substitution reaction. As a result, sodium phosphate and hydrogen compounds are formed.




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