CuSO4+NaOH= NaCl+AgNO3= Zn+HCl= CaCl+H2S=
CuSO4 + 2NaOH = Na2SO4 + Cut (OH)2 - Осадок NaCl + AgNO3 = NaNO3 + AgCl - Осадок Zn + 2HCl = H2 + ZnCl2 CaCl2 + H2S = 2HCl + CaS - Осадок