1. Азот
2. Золото
3. CaCO3+H2O
4. BaO
5. Хлороводород и аммиак
B1. 156 3K2CO3+2Fe(OH)3=Fe2(CO3)3+6KOH
C1. S+Hg=HgS
2HgS+3O2=2SO2+2HgO
SO2+2NaOH=Na2SO3+H2O
Na2SO3+HCl=NaCl+H2SO3
NaCl+H2SO4=Na2SO4+2HCl
C2. 4Zn + 5H2SO4 = 4ZnSO4 + 4H2O + H2S
Zn(0) -2e- --> Zn(+2) I 4
S(+6) +8e- --> S(-2) I 1
СaC2 + 2H2O ---- Ca(OH)2 + CH≡CH
CH≡CH + H2O ---(Hg⁺)--- CH3-CHO
5CH3-CHO + 2KMnO4 + 3H2SO4 --- 5CH3-COOH + 2MnSO4 + K2SO4 + 3H2O
2CH3-COOH + CaCO3 ---- (CH3-COO)2Ca + CO2 + H2O
(CH3-COO)2Ca ----(t)--- CH3 - C - CH3 + CaCO3
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