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balance the following equation in acidic conditions. phases are optional H_3AsO_3 + I_3 ---> H_3AsO_4 +...

balance the following equation in acidic conditions. phases are optional

H_3AsO_3 + I_3 ---> H_3AsO_4 + I^-1

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Homework Answers

Answer #1

H3AsO3 + I3 = H3AsO4 + I-

Split

H3AsO3 --> H3AsO4

I3 = I-

balance elements

H3AsO3 --> H3AsO4

I3 = 3I-

balnce O adding H2O

H2O + H3AsO3 --> H3AsO4

I3 = 3I-

blaance H adding H+

H2O + H3AsO3 --> H3AsO4 +2H+

I3 = 3I-

balance charges

H2O + H3AsO3 --> H3AsO4 +2H+ +2e-

3e- + I3 = 3I-

Balance E

3H2O + 3H3AsO3 --> 3H3AsO4 +6H+ +6e-

6e- + 2I3 = 6I-

add both

3H2O + 3H3AsO3 + 6e- + 2I3--> 3H3AsO4 +6H+ +6e- + 6I-

cancel common terms

3H2O + 3H3AsO3 + 2I3--> 3H3AsO4 +6H+ 6I-

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