Carry out the following transformations: a) Cu – CuO – CuS04 – Cu (OH) 2 – CuO – Cu

Carry out the following transformations: a) Cu – CuO – CuS04 – Cu (OH) 2 – CuO – Cu b) P – P205 – H3P04 Ca3 (P04) 2 c) Li – Li20 – LiOH – Li2S04

A) 1) 2Cu + O2 → 2CuO (compound reaction);

2) CuO + H2SO4 → CuSO4 + H2O (exchange reaction);

3) СuSO4 + 2KOH → Cu (OH) 2 ↓ + K2SO4 (exchange reaction);

4) Cu (OH) 2 ↓ → CuO + H2O (decomposition reaction);

5) 2CuO → 2Cu + O2 (decomposition reaction).

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

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

3) 2H3PO4 + 3Сa (OH) 2 → Ca3 (PO4) 2 ↓ + 6H2O (exchange reaction);

B) 1) 4Li + O2 → 2Li2O (compound reaction);

2) Li2O + H2O → 2LiOH (compound reaction);

3) 2LiOH + Na2SO4 → Li2SO4 + 2NaOH (exchange reaction).