Balancing Redox Equations help!!!!?

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Balancing Redox Equations help!!!!?

1. HNO3 + I2 ----> HIO3 + NO2 + H2O
2. K2Cr2O7 + H2S + H2SO4 ---> Cr2(SO4)3 + S + K2SO4 + H2O

Thanx!

2007-05-01 04:46:05 · 2 answers · asked by shambhalachick 1 in Science & Mathematics ➔ Chemistry

2 answers

(HNO3 + H+ + 1e- >> NO2 + H2O) x 10

I2 + 6 H2O >> 2 IO3- + 12 H+ +10e-

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10 HNO3 + I2 >> 10NO2 + 2IO3- + 4H2O + 2H+

Cr2O72- + 14 H+ + 6e->> 2Cr3+ + 7H2O

(S2- >> S + 2e-) x3

K2Cr2O7 + 3H2S + 4H2SO4 >> Cr2(SO4)3+ 3S + K2SO4 +7 H2O

2007-05-01 05:10:09 · answer #1 · answered by Anonymous · 0⤊ 0⤋

10HNO3 + I2 ------> 2HIO3 + 10NO2 + 4H2O

K2Cr2O7 + 3H2S + 4H2SO4 ----> Cr2(SO4)3 + 3S + K2SO4 + 7H2O

2007-05-01 12:11:47 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋