Объяснение:
1) Zn + H2SO4 = ZnSO4 + H2↑
ZnSO4 + BaCl2 = ZnCl2 + BaSO4↓
ZnCl2 + 2NaOH = Zn(OH)2↓ + 2NaCl
Zn(OH)2 = ZnO + H2O
ZnO + 2HNO3 = Zn(NO3)2 + H2O
2) 2Cr + 3Cl2 = 2CrCl3
CrCl3 + 3NaOH = Cr(OH)3↓ + 3NaCl
Cr(OH)3 + 3HNO3 = Cr(NO3)3 + 3H2O
Cr(NO3)3 + 3NaOH = Cr(OH)3 + 3NaNO3
2Cr(OH)3 + 3H2SO4 = Cr2(SO4)3 + 6H2O
Cr2(SO4)3 = Cr2O3 + 3SO3
Объяснение:
1) Zn + H2SO4 = ZnSO4 + H2↑
ZnSO4 + BaCl2 = ZnCl2 + BaSO4↓
ZnCl2 + 2NaOH = Zn(OH)2↓ + 2NaCl
Zn(OH)2 = ZnO + H2O
ZnO + 2HNO3 = Zn(NO3)2 + H2O
2) 2Cr + 3Cl2 = 2CrCl3
CrCl3 + 3NaOH = Cr(OH)3↓ + 3NaCl
Cr(OH)3 + 3HNO3 = Cr(NO3)3 + 3H2O
Cr(NO3)3 + 3NaOH = Cr(OH)3 + 3NaNO3
2Cr(OH)3 + 3H2SO4 = Cr2(SO4)3 + 6H2O
Cr2(SO4)3 = Cr2O3 + 3SO3