Question

Какие реакции пойдут?
Na+H2O
Cu+H2O
CaO+HCl
CaCO3+BaSO4
K2SO4+NaCl
Ba(OH)2+CuCl2

Answer 1

2Na + 2H2O = 2NaOH + H2↑
CuO + H2O ≠
CaO + 2HCl = CaCl2 + H2O
CaCO3 + BaSO4 ≠
K2SO4 + NaCl ≠
Ba(OH)2 + CuCl2 = BaCl2 + Cu(OH)2↓