Решите цепочки превращений: 1. nicl2 -> ni -> nicl2 -> ni(oh)2 -> nio -> niso4 -> ni(oh)1 2. mgo -> mg -> mgcl2 -> mg(oh)2 -> mgo -> mgso4 -> mg(oh)2 3. cr -> cr2o3 -> crcl3 -> cr(oh)3 -> cr -> crcl3 4. znso4 -> zn(oh)2 -> zno -> < - zn -> zncl2 -> zn(oh)2 5. pb -> pbo -> pbcl2 -> pb(oh)2 -> pbo -. pb -> pbcl2 6. bacl2 -> ba(oh)2 -> bao -> < - ba -> bacl2 -> baso4

Jubile Jubile    3   26.05.2019 02:10    2

Ответы
VaneK12354 VaneK12354  01.10.2020 11:47
1. NiCl_2 + 2Na = 2NaCl + Ni
Ni + 2HCl = NiCl_2 + H_2
NiCl_2 + 2KOH = 2KCl + Ni(OH)_2
Ni(OH)_2 =^t NiO + H_2O
NiO + H_2SO_4 = NiSO_4 + H_2O
NiSO_4 + Mg(OH)_2 = Ni(OH)_2 + MgSO_4
2. MgO + H_2 = Mg + H_2O
Mg + 2HCl = MgCl_2 + H_2
MgCl_2 + Pb(OH)_2 = Mg(OH)_2 + PbCl_2
Mg(OH)_2 =^t MgO + H_2O
MgO + H_2SO_4 = MgSO_4 + H_2O
MgSO_4 + Ba(OH)_2 = BaSO_4 + Mg(OH)_2
3. 4Cr + 3O_2 = 2Cr_2O_3
Cr_2O_3 + 6HCl = 2CrCl_3 + 3H_2O
CrCl_3 + 3KOH = Cr(OH)_3 + 3KCl
-
2Cr + 6HCl = 2CrCl_3 + 3H_2
4.ZnSO_4 + 2KOH = Zn(OH)_2 + K_2SO_4
Zn(OH)_2 =^t ZnO + H_2O
ZnO + H_2 = Zn + H_2O
2Zn + O_2 = 2ZnO
Zn + 2HCl = ZnCl_2 + H_2
ZnCl_2 + 2NaOH = 2NaCl + Zn(OH)_2
5. 2Pb + O_2 = 2PbO
PbO + 2HCl = PbCl_2 + H_2O
PbCl_2 + 2NaOH = 2NaCl + Pb(OH)_2
Pb(OH)_2 =^t PbO + H_2O
Pb + 2HCl = PbCl_2 + H_2
6. BaCl_2 + 2KOH = KCl + 2Ba(OH)_2
Ba(OH)_2 =^t BaO + H_2O
BaO + H_2 = Ba + H_2O
2Ba + O_2 = 2BaO
Ba + 2HCl = BaCl_2 + H_2
BaCl_2 + H_2SO_4 = 2HCl + BaSO_4
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