Write the reaction equation: a) Mg – MgO – Mg (NO3) 2 – Mg (OH) 2 b) P – P2O5 – H3PO4

Write the reaction equation: a) Mg – MgO – Mg (NO3) 2 – Mg (OH) 2 b) P – P2O5 – H3PO4 – K3PO4 c) Al2O3 – AlCL3 – Al (OH) 3 – Al (NO3) 3

а)

1) 2Mg + O2 → 2MgO (compound reaction);

2) MgO + 2HNO3 → Mg (NO3) 2 + H2O (exchange reaction);

3) Mg (NO3) 2 + 2NaOH → Mg (OH) 2 ↓ + 2NaNO3 (exchange reaction);

b)

1) 4P + 5O2 → 2P2O5 (compound reaction);

2) P2O5 + 3H2O → 2H3PO4 (compound reaction);

3) H3PO4 + 3KOH → K3PO4 + 3H2O (exchange reaction).

c)

1) Al2O3 + 6HCl → 2AlCl3 + 3H2O (exchange reaction);

2) AlCl3 + 3KOH → Al (OH) 3 ↓ + 3KCl (exchange reaction);

3) Al (OH) 3 ↓ + 3HNO3 → Al (NO3) 3 + 6H2O (exchange reaction).