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i'd like to balance the following one
ClO3- + AsO2- --> AsO4---(3-) + Cl-
then,
ClO3- + 6H+ + 6e- ----> Cl- + 3H2O,
AsO2- +2H2O +2e- ----> AsO4--- + 4H+
multiply the 2nd by 3
3AsO2- +6H2O +6e- ----> 3AsO4--- + 12H+
add them together should be
ClO3- + 3AsO2- +3H2O ----> 3AsO4--- + Cl- + 6H+
but I have still 12e- left
where did I make a mistake?
could anyone can help me? thanks in advance!
ClO3- + AsO2- --> AsO4---(3-) + Cl-
then,
ClO3- + 6H+ + 6e- ----> Cl- + 3H2O,
AsO2- +2H2O +2e- ----> AsO4--- + 4H+
multiply the 2nd by 3
3AsO2- +6H2O +6e- ----> 3AsO4--- + 12H+
add them together should be
ClO3- + 3AsO2- +3H2O ----> 3AsO4--- + Cl- + 6H+
but I have still 12e- left
where did I make a mistake?
could anyone can help me? thanks in advance!
