а) 1. S+O2=SO2
2. 2SO2+O2=2SO3
3. SO3+H2O=H2SO4
4. H2SO4+2NaOH=Na2SO4+2H2O
5. Na2SO4+BaCl2=BaSO4+2NaCl
б) 1. 2Ba+O2=2BaO
2. BaO+H2O=Ba(OH)2
3. Ba(OH)2+2HCl=BaCl2+2H2O
4. BaCl2+Na2CO3=BaCO3+2NaCl
в) 1. CuSO4+2NaOH=Cu(OH)2+Na2SO4
2. Cu(OH)2=CuO+H2O
3. CuO+2HCl=CuCl2+H2O
4. CuCl2+2AgNO3=Cu(NO3)2+2AgCl
5. Cu(NO3)2+H2S=CuS+2HNO3
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Answers & Comments
а) 1. S+O2=SO2
2. 2SO2+O2=2SO3
3. SO3+H2O=H2SO4
4. H2SO4+2NaOH=Na2SO4+2H2O
5. Na2SO4+BaCl2=BaSO4+2NaCl
б) 1. 2Ba+O2=2BaO
2. BaO+H2O=Ba(OH)2
3. Ba(OH)2+2HCl=BaCl2+2H2O
4. BaCl2+Na2CO3=BaCO3+2NaCl
в) 1. CuSO4+2NaOH=Cu(OH)2+Na2SO4
2. Cu(OH)2=CuO+H2O
3. CuO+2HCl=CuCl2+H2O
4. CuCl2+2AgNO3=Cu(NO3)2+2AgCl
5. Cu(NO3)2+H2S=CuS+2HNO3