Question

1) Mg + H3 PO4 = 2) MgO + H CL = 3) Mg (OH)2 + H3 PO4 = Нужно составить (написать что образуется) и уравнять химическое уравнение.

Answer 1

MgO + 2HCl = MgCl₂ + H₂O (хлорид магния и вода)
3Mg(OH)₂ + 2H₃PO₄ = Mg₃(PO₄)₂ +  6H₂O (формально такая реакция)

Answer 2

Chemical Equations and Balancing

To write and balance the chemical equations for the given reactions, we'll start with the chemical formulas provided.

1) Mg + H3PO4 = 2) MgO + HCl = 3) Mg(OH)2 + H3PO4 =

Let's proceed to write and balance the chemical equations for each of these reactions.

1) Mg + H3PO4 = Mg(H2PO4)2 + H2

The balanced chemical equation for the reaction between magnesium and phosphoric acid is: ``` Mg + 2H3PO4 = Mg(H2PO4)2 + 3H2 ```

2) MgO + HCl = MgCl2 + H2O

The balanced chemical equation for the reaction between magnesium oxide and hydrochloric acid is: ``` MgO + 2HCl = MgCl2 + H2O ```

3) Mg(OH)2 + H3PO4 = Mg(H2PO4)2 + 2H2O

The balanced chemical equation for the reaction between magnesium hydroxide and phosphoric acid is: ``` Mg(OH)2 + 2H3PO4 = Mg(H2PO4)2 + 2H2O ```

These balanced chemical equations represent the reactions between the given substances.