From the list of the following substances, select those that enter into a chemical reaction
| April 9, 2021 | education
From the list of the following substances, select those that enter into a chemical reaction with phosphoric acid: CuO, ZnO, ZnO (OH) 2, Zn, Cu, Cu (OH) 2. Give the equations of the ongoing reactions.
1) 3CuO + 2H3PO4 → Cu3 (PO4) 2 + 3H2O (copper (II) phosphate).
2) ZnO + 2H3PO4 → Zn3 (PO4) 2 + 3H2O (zinc phosphate).
3) 3Zn (OH) 2 + 2H3PO4 → Zn3 (PO4) 2 + 6H2O (zinc phosphate).
4) 3Zn + 2H3PO4 → Zn3 (PO4) 2 + 3H2 (zinc phosphate, hydrogen).
5) Cu + H3PO4 → the reaction does not take place, since acids react only with metals that are in the row of metal activity to hydrogen.
6) 3Cu (OH) 2 + 2H3PO4 → Cu3 (PO4) 2 + 6H2O (copper (II) phosphate).
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