например так:
2Zn + O2 = 2ZnO
ZnO + NaOH(конц) = Na2ZnO2 + H2O
Na2ZnO2 + 2H2SO4 = Na2SO4 + ZnSO4 + 2H2O
1. С+О2=СО2
2. СН4+2О2=СО2+2Н2О
3. СаСО3=СаО+СО2
4. СаСО3+2НСl=СаCl2+СО2+Н2О
5. C+4HNO3(конц)=CO2+4NO2+2H2O
6. C+2H2SO4(конц)=CO2+2SO3+2H2O
7. СО2+Н2О=Н2СО3
СО2+СаО=СаСО3
СО2+2NaOH=Na2CO3+Н2О
СО2+Na2SiO3=Na2CO3+SiO2
8. СО2+Са(ОН)2=СаСО3+Н2О
1. C2H5OK+H2O->C2H5OH+KOH
C2H5OH+HCl->C2H5Cl+H2O
C2H5Cl+KOH-(C2H5OH)->CH2=CH2+KCl+H2O
3CH2=CH2+2KMnO4+4H2O-(5 °C)->3HO-CH2-CH2-OH+2MnO2+2KOH
HO-CH2-CH2-OH+2CH3COOH-(H2SO4)->CH3COOCH2CH2OOCH3+ +2H2O
2. C6H12O6-(Дрожжи)->2C2H5OH+2CO2
CH3COOH+C2H5OH-(H2SO4)->CH3COOC2H5+H2O
CH3COOC2H5+H2O-(H+)->CH3COOH+C2H5OH
2C2H5OH+2Na->2C2H5ONa+H2
C2H5ONa+HCl->C2H5OH+NaCl
2C2H5OH-(H2SO4\t<140<span>°C)->C2H5-O-C2H5+H2O
</span>
3. 3C2H2-(C акт\300<span>°C)->C6H6
</span>C6H6+CH3Cl-(AlCl3)->C6H5CH3+HCl
5C6H5CH3+6KMnO4+9H2SO4->5C6H5COOH+3K2SO4+6MnSO4+14H2O
C6H5COOH+C2H5OH-(H2SO4)->C6H5COOC2H5+H2O
C6H5COOC2H5+KOH->C6H5COOK+C2H5OH
4. CaC2+2H2O->Ca(OH)2+C2H2
<span>3C2H2+8KMnO4+4H2O->3K2C2O4+2KOH+8MnO2+6H2O
</span>KOOC-COOK+H2SO4->HOOC-COOH+K2SO4
HOOC-COOH+H2->HCOOH
HCOOH+KOH->HCOOK+H2O
<span>3HCOOK+H3PO4->3HCOOH+K3PO4
</span>
5. 3C2H2-(C акт\300<span>°C)->C6H6
C6H6+C2H5Cl-(AlCl3)->C6H5C2H5+HCl
C6H5C2H5+Cl2-(hv)->C6H5C2H4Cl+HCl
C6H5CH2-CH2-Cl+KOH-(C2H5OH)->C6H5CH=CH2+KCl+H2O
nCH=CH2->[-CH-CH2-]n
I I
C6H5 C6H5
6. CaC2+2H2O->Ca(OH)2+C2H2
C2H2+H2O-(H2SO4\HgSO4)->CH3CHO
5CH3CHO+2KMnO4+3H2SO4->5CH3COOH+K2SO4+2MnSO4+3H2O
2CH3COOH+CaCO3->(CH3COO)2Ca+CO2+H2O
</span>(CH3COO)2Ca-(160°C<span>)->CaCO3+CH3COCH3
</span>
7. CH3COONa+NaOH->CH4+Na2CO3
2CH4-(1500<span>°C)->C2H2+3H2
</span>3C2H2-(C акт\300<span>°C)->C6H6
</span>C6H6+C2H5Cl-(AlCl3)->C6H6C2H5+HCl
<span>C6H5C2H5+2K2Cr2O7+8H2SO4->C6H5COOH+CO2+2K2SO4+2Cr2(SO4)3+10H2O</span>
2Cu(OH)2+2H2SO4->2CuSO4+4H2O
196--------196
3,92=x<----3,92
Cu(OH)2->CuO+H2O
98--------80
3,92------x=3,2гр оксид меди
Это платина))
Так как не удавалось отличить сплав с платиной от чистого золота
