Установите соответствие между схемой реакции и изменением степени окисления Серы в ней. ZnS + O2 → ZnO + SO2
SO2 + HNO3 → H2SO4 + NO2
Na + H2SO4 (концентрированная) → Na2SO4 + H2S + H2O
H2SO4 (концентрированная) + Cu → CuSO4 + SO2 + H2O
Варианты ответа:
-2 → +4
+6 → +4
+4 → +6
+6→ -2
2CH4=[t,p]=C2H2+3H2
C2H2 + H2O=[Hg²⁺]= CH3-CHO
3CH3-CHO+2KMnO4+H2SO4=3CH3-COOH+K2SO4+MnO2+H2O
H3C-COOH+Cl2=[hv]= Cl-CH2-COOH+HCl
2H2O=[ток]=2H2+O2
N2+3H2=[кат,t]=2NH3
Cl-CH2-COOH+2NH3=H2N-CH2-COOH+NH4Cl
#2
1)
2H2O=[ток]=2H2+O2
2СН4+O2=[PbO/Al2O3]=C2H4+2H2O
C2H4+H2O=C2H5OH
2)
2H2O=[ток]=2H2+O2
2СH4=C2H2+3H2
C2H2+H2O=[Hg²⁺]=CH3-CHO
CH3-CHO+H2=CH3-CH2-OH
3) не могу придумать
#3
СH4+2O2=CO2+2H2O
6CO2+6H2O=C6H12O6+6O2
C6H12O6=2CH3CH(OH)COOH
#4
а)CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
С2H6=[t,p]= CH2=CH2
2CH4+5O2=2CO+4H2O
H2O+CO=H2+CO2
CH2=CH2+H2O+CO2=CH3CH2CHO
б)CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
C2H6+Cl2=[hv]=C2H5Cl+HCl
3C2H5Cl+6Na+3CH3Cl=C4H10+C2H6+C3H8+6NaCl
С3H8=[t,p]= CH3-CH=CH2
CH3-CH=CH2+H2O=CH3-CH(OH)-CH3
CH3-CH(OH)-CH3=CH3-C(O)-CH3+H2
#5
а)CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
С2H6=[t,p]= CH2=CH2
2CH4+5O2=2CO+4H2O
H2O+CO=H2+CO2
CH2=CH2+H2O+CO2=CH3CH2CHO
CH3CH2CHO+H2=CH3CH2CH2(OH)
б)CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
C2H6+Cl2=[hv]=C2H5Cl+HCl
3C2H5Cl+6Na+3CH3Cl=C4H10+C2H6+C3H8+6NaCl
С3H8=[t,p]= CH3-CH=CH2
CH3-CH=CH2+H2O=CH3-CH(OH)-CH3
в)CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+CH3-CH3
C2H6+Cl2=[hv]=C2H5Cl+HCl
3C2H5Cl+6Na+3CH3Cl=C4H10+C2H6+C3H8+6NaCl
С3H8=[t,p]= CH3-CH=CH2
2Na+2H2O=2NaOH+H2
CH3-CH2Cl-CH2Cl+2NaOH=[H2O]=2NaCl+CH3-CH2(OH)-CH2(OH)
#6
2CH4+5O2=2CO+4H2O
H2O+CO=H2+CO2
СO+2H2=CH3OH
2CH4=[t,p]=C2H2+3H2
C2H2+Cl2=CH2Cl-CH2Cl
2Na+2H2O=2NaOH+H2
CH2Cl-CH2Cl+2NaOH=[H2O]=CH2(OH)-CH2(OH)+2NaCl
CH2(OH)-CH2(OH)+2O2=[t]=2H2O+HOOC-COOH
HOOC-COOH+2CH3OH=[H2SO4]=2H2O+CH3OOC-COOCH3
#7
2CH4=[t,p]=C2H2+3H2
3C2H2=[Cакт]=C6H6
C6H6+Cl2=C6H5Cl+HCl
2Na+2H2O=2NaOH+H2
C6H5Cl+NaOH=NaCl+C6H5OH
2CH4+5O2=2CO+4H2O
H2O+CO=H2+CO2
СO+2H2=CH3OH
C6H5OH+CH3OH=[t]=C6H5-O-CH3+H2O
#8
2CH4+5O2=2CO+4H2O
H2O+CO=H2+CO2
СO+2H2=CH3OH
CH4+Cl2=[hv]=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+C2H6
C2H6=[t,p]=CH2=CH2+H2
CH2=CH2+H2O=C2H5OH
C2H5OH+CH3OH=H2O+C2H5-O-CH3
#9
2CH4=[t,p]=C2H2+3H2
C2H2+Cl2=CH2Cl-CH2Cl
2Na+2H2O=2NaOH+H2
CH2Cl-CH2Cl+2NaOH=[H2O]=CH2(OH)-CH2(OH)+2NaCl
CH2(OH)-CH2(OH)+2O2=[t]=2H2O+HOOC-COOH
HOOC-COOH+2PCl5=ClOC-COCl+2HCl+2POCl3
#10
2СН4+3О2=2НСООН+2Н2О
2СН4+O2=[PbO/Al2O3]=C2H4+2H2O
C2H4+H2O=C2H5OH
HCOOH+C2H5OH=[H2SO4]=HCOOC2H5+H2O
в [] написаны условия