Ответ:
a)
1) 2Na+2H2O=2NaOH+H2
2) NaOH + CO2 = Na2CO3 + H2O
3) Na2CO3+2HCl = 2NaCl+CO2+H2O
4) при кипячении:
2NaCl(тв.) + H2SO4(конц.) = Na2SO4 + 2HCl
б)
1) 2Ca+O2 = 2CaO
2) CaO + H2O = Can(OH)2
3) Ca(OH)2 + CO2 = CaCO3↓ + H2O
4) CaCO₃ + 2HNO₃ = Ca(NO₃)₂ + CO₂↑ + H₂O
в)
1) 2Cu+O₂=2CuO
2) CuO + 2HCl = CuCl2 + H2O
3) CuCl2+2 NaOH = Сu(OH)2 + 2NaCl
4) Cu(OH)2 = (t) CuO + H2O
5) 3CuO + 2NH3 = 3Cu + N2 + 3H2O
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Answers & Comments
Ответ:
a)
1) 2Na+2H2O=2NaOH+H2
2) NaOH + CO2 = Na2CO3 + H2O
3) Na2CO3+2HCl = 2NaCl+CO2+H2O
4) при кипячении:
2NaCl(тв.) + H2SO4(конц.) = Na2SO4 + 2HCl
б)
1) 2Ca+O2 = 2CaO
2) CaO + H2O = Can(OH)2
3) Ca(OH)2 + CO2 = CaCO3↓ + H2O
4) CaCO₃ + 2HNO₃ = Ca(NO₃)₂ + CO₂↑ + H₂O
в)
1) 2Cu+O₂=2CuO
2) CuO + 2HCl = CuCl2 + H2O
3) CuCl2+2 NaOH = Сu(OH)2 + 2NaCl
4) Cu(OH)2 = (t) CuO + H2O
5) 3CuO + 2NH3 = 3Cu + N2 + 3H2O