Ca(OH)2+CuCl2--->CaCl2+Cu(OH)2↓
Ca2+ +2OH- +Cu2+ +2Cl- --->Ca2+ +2Cl- +Cu(OH)2↓
2OH- +Cu2+ --->Cu(OH)2↓
Na2S+ZnBr2--->2NaBr+ZnS↓
2Na+ +S2- +Zn2+ +2Br- --->2Na+ +2Br- +ZnS↓
S2- +Zn2+ --->ZnS
CuCl2+H2S--->CuS↓+2HCl
Cu2+ +2Cl- +2H+ +S2- --->CuS↓ +2H+ +2Cl-
Cu2+ +S2- --->CuS↓
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Ca(OH)2+CuCl2--->CaCl2+Cu(OH)2↓
Ca2+ +2OH- +Cu2+ +2Cl- --->Ca2+ +2Cl- +Cu(OH)2↓
2OH- +Cu2+ --->Cu(OH)2↓
Na2S+ZnBr2--->2NaBr+ZnS↓
2Na+ +S2- +Zn2+ +2Br- --->2Na+ +2Br- +ZnS↓
S2- +Zn2+ --->ZnS
CuCl2+H2S--->CuS↓+2HCl
Cu2+ +2Cl- +2H+ +S2- --->CuS↓ +2H+ +2Cl-
Cu2+ +S2- --->CuS↓