Pomogite pojalusta <3<hr>
CuO + H2SO4 = CuSO4 + H2O CuO + 2HCl = CuCl2 + H2O 3K2O + P2O5 = 2K3PO4 K2O + H2O = 2KOH K2O + H2SO4 = K2SO4 + H2O K2O + 2HCl = 2KCl + H2O SO2 + 2NaOH = Na2SO3 + H2O SO2 + H2O = H2SO3