Balance the following redox equations using the half reaction method: a. N 2 H 4

Question

Balance the following redox equations using the half reaction method:

a. N2H4 + KBrO3 T N2 + KBr + H2O

b. KBrO2 + K2S2O3 + H2O T KBr + K2S4O6 + KOH

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c. Zn + HNO3 T Zn(NO3)2 + NH4NO3 + H2O

d. KMnO4 + MnCl2 + KOH T MnO2 + KCl + H2O

e. K2S3O6 + KClO + KOH T K2SO4 + KCl + H2O

Balance the following redox equations using the half reaction method: N2H4 + KBrO3 T N2 + KBr + H2O KBrO2 + K2S2O3 + H2O T KBr + K2S4O6 + KOH Zn + HNO3 T Zn(NO3)2 + NH4NO3 + H2O KMnO4 + MnCl2 + KOH T MnO2 + KCl + H2O K2S3O6 + KClO + KOH T K2SO4 + KCl + H2O

Explanation / Answer

3 N2H4 + 2 KBrO3 = 3 N2 + 2 KBr + 6 H2O

-21 KBrO2 + 4 K2S2O3 + 46 H2O = -21 KBr + 2 K2S4O6 + 4 KOH23

4 Zn + 10 HNO3 = 4 Zn(NO3)2 + NH4NO3 + 3 H2O

2 KMnO4 + 3 MnCl2 + 4 KOH = 5 MnO2 + 6 KCl + 2 H2O

K2S3O6 + 4 KClO + 4 KOH = 3 K2SO4 + 4 KCl + 2 H2O

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