Ответ учителя по предмету Химия
Ответ: 1 — D, 2 — A, 3 — C, 4 — B, 5 — G.
1) CaO + 2HCl = CaCl2 + H2O
CaO + 2H+ + 2Cl- = Ca2+ + 2Cl- + H2O
CaO + 2H+ = Ca2+ + H2O
2) CuSO4 + BaCl2 = CuCl2 + BaSO4
Cu2+ + SO4(2-) + Ba2+ + 2Cl- = Cu2+ + 2Cl- + BaSO4
Ba2+ + SO4(2-) = BaSO4
3) H2SO4 + Ba(OH)2 = BaSO4 + 2H2O
2H+ + SO4(2-) + Ba2+ + 2OH- = BaSO4 + 2H2O
4) Ca(OH)2 + 2HCl = CaCl2 + 2H2O
Ca2+ + 2OH- + 2H+ + 2Cl- = Ca2+ + 2Cl- + 2H2O
H+ + OH- = H2O
5) Cu(OH)2 + 2HNO3 = Cu(NO3)2 + 2H2O
Cu(OH)2 + 2H+ + 2NO3(-) = Cu2+ + 2NO3(-) + 2H2O
Cu(OH)2 + 2H+ = Cu2+ + 2H2O
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