Question

Помогите с химией пожалуйста! 1)HCl + CAO 2) H2SO4 + CAO 3) H3PO4+ CAO 4) H3PO4 + Al2O3

Answer 1

1) 2hcl + cao = h2o + cacl2
2) h2so4 + cao = h2o + caso4
3) 2h3po4 + 3cao = 3h2o + ca3(po4)2 
4) 2h3po4 + al2o3 = 3h2o + 2alpo4

Answer 2

1. HCl + CaO → CaCl2 + H2O

2. H2SO4 + CaO → CaSO4 + H2O

3. H3PO4 + CaO → Ca3(PO4)2 + H2O

4. H3PO4 + Al2O3 → AlPO4 + H2O

In the first three reactions, CaO reacts with the acid to form a salt and water. In the fourth reaction, Al2O3 reacts with H3PO4 to form aluminum phosphate and water.