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Zapisz reakcję redoks. Uzgodnij reakcję.
a) HI + H2SO4 -> I2 + H2S + H2O
b) FeCl3 + SnCl2 -> FeCl2 + SnCl4
c) H2SO3 + Cl2 + H2O -> H2SO4 + HCl
d) Mg + HNO3 -> Mg(NO3)2 + N2O + H2O
e) Ca + H2O -> Ca(OH)2 + H2
f) H2S + O2 -> SO2 + H2O
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a) 8HI + H2SO4 -> 4 I2 + H2S + 4H2O
8I(-) - 8e---->4 I2(0)
S(+VI) + 8e---->S(-II)
b) 2FeCl3 + SnCl2 -> 2FeCl2 + SnCl4
2Fe(+III) + 2e---->2Fe(+II)
Sn(+II) - 2e---->Sn(+IV)
c) H2SO3 + Cl2 + H2O -> H2SO4 + 2HCl
S(+IV) - 2e---->S(+VI)
Cl2(0) + 2e---->2Cl(-I)
d) 4Mg + 10HNO3 -> 4Mg(NO3)2 + N2O + 5H2O
4Mg(0) - 8e---->4Mg(+II)
2N(+V) + 8e---->2N(+I)
e) Ca + 2H2O -> Ca(OH)2 + H2
Ca(0) - 2e---->Ca(+II)
2H(+I) + 2e---->H2(0)
f) 2H2S + 3 O2 -> 2SO2 + 2H2O
2S(-II) - 12e---->2S(+IV)
3 O2(0) + 12e---->6 O(-II)