1) Na2CO3 + 2HCl = 2NaCl + CO2 + H2O
2Na(+) + CO3(-2) + 2H(+) + 2Cl(-) = 2Na(+) + 2Cl(-) + CO2 + H2O
CO3(-2) + 2H(+) = CO2 + H2O
K2O + 2HCl = 2KCl + H2O
K2O + 2H(+) + 2Cl(-) = 2K(+) + 2Cl(-) + H2O
K2O + 2H(+) = 2K(+) + H2O
Zn(OH)2 + H2SO4 = ZnSO4 + 2H2O
Zn(OH)2 + 2H(+) + SO4(-2) = Zn(+2) + SO4(-2) + 2H2O
Zn(OH)2 + 2H(+) = Zn(+2) + 2H2O
2) Cu(NO3)2 + Ca(OH)2 = Cu(OH)2 + Ca(NO3)2
Cu(+2) + 2NO3(-) + Ca(OH)2 = Cu(OH)2 + Ca(+2) + 2NO3(-)
Cu(+2) + Ca(OH)2 = Cu(OH)2 + Ca(+2)
ZnCl2 + Na2S = ZnS + 2NaCl
Zn(+2) + 2Cl(-) + 2Na(+) + S(-2) = ZnS + 2Na(+) + 2Cl(-)
Zn(+2) + S(-2) = ZnS
Ca + 2H2O = Ca(OH)2 + H2
1) Na2CO3 + 2HCl = 2NaCl + CO2 + H2O
2Na(+) + CO3(-2) + 2H(+) + 2Cl(-) = 2Na(+) + 2Cl(-) + CO2 + H2O
CO3(-2) + 2H(+) = CO2 + H2O
K2O + 2HCl = 2KCl + H2O
K2O + 2H(+) + 2Cl(-) = 2K(+) + 2Cl(-) + H2O
K2O + 2H(+) = 2K(+) + H2O
Zn(OH)2 + H2SO4 = ZnSO4 + 2H2O
Zn(OH)2 + 2H(+) + SO4(-2) = Zn(+2) + SO4(-2) + 2H2O
Zn(OH)2 + 2H(+) = Zn(+2) + 2H2O
2) Cu(NO3)2 + Ca(OH)2 = Cu(OH)2 + Ca(NO3)2
Cu(+2) + 2NO3(-) + Ca(OH)2 = Cu(OH)2 + Ca(+2) + 2NO3(-)
Cu(+2) + Ca(OH)2 = Cu(OH)2 + Ca(+2)
ZnCl2 + Na2S = ZnS + 2NaCl
Zn(+2) + 2Cl(-) + 2Na(+) + S(-2) = ZnS + 2Na(+) + 2Cl(-)
Zn(+2) + S(-2) = ZnS
Ca + 2H2O = Ca(OH)2 + H2
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CH2-C-CH2-CH2-C-CH3
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CH3 CH3
изомеры:
1. CH3-(CH2)8-CH3
2. CH3--CH---CH---CH---CH2--CH2--CH3
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CH3 CH3 CH3
3. CH3--CH---CH---CH2---CH2---CH2--CH2--CH3
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CH3 CH3
4. CH3--CH---CH2---CH---CH2---CH2--CH2--CH3
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CH3 CH3
5. CH3--CH---CH2---CH2---CH2---CH--CH2--CH3
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CH3 CH3
гомолог:
CH3 CH3
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CH2-C-CH2-CH2-C-CH2-CH3
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CH3 CH3