Carry out the transformations: a) CaO → Ca (OH) 2 → Ca (HCO3) 2 → CaCO3;
| May 1, 2021 | education
Carry out the transformations: a) CaO → Ca (OH) 2 → Ca (HCO3) 2 → CaCO3; b) Ba (OH) 2 → BaCl2 → AgCl → Ag2SO4; c) С → СО2 → CuCO3 → CuO.
a) CaO + H2O => Ca (OH) 2;
Ca (OH) 2 + CO2 => CaCO3 ↓ + H2O;
CaCO3 + CO2 + H2O => Ca (HCO3) 2.
b) Ba (OH) 2 + 2HCl => BaCl2 + 2H2O;
BaCl2 + 2AgNO3 => 2AgCl ↓ + Ba (NO3) 2;
2AgCl + H2SO4 (conc.) = (TC) => Ag2SO4 + 2HCl ↑.
c) C + O2 => CO2;
CO2 + CuCO3 * Cu (OH) 2 = (4.6 MPa, 180C) => 2CuCO3 + H2O ↑;
CuCO3 = (290C) => CuO + CO2 ↑.
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