Co(OH)2 + 2 CHCH2 → CoCl2 + 2 H2O
Co(OH)2+2HCl→CoCl2+2H2O
Co(OH)2 + 2 HCl → CoCl2 + 2 H2O
Co(OH)2 +2HCl→CoCl2 +2H2O
Co+ +2HCl→CoCl2 +2H2O