Question
balancing IO3^- (aq) + I^- (aq) > I2 (aq) , using the half reactions method
Answers
DrBob222
I will omit the aq and s. You add those to the finished equation.
IO3^- (aq) + I^- (aq) > I2 (aq)
2IO3^- + 10e + 12H^+ ==> I2 + 6H2O
2I^- ==> I2 + 2e
----------------------------------
Multiply equation 1 by 1 and equation 2 by 5. Add them. That give an equation that is TWICE what you wanted so divide all of the coefficients by 2 and you'll have it.
IO3^- (aq) + I^- (aq) > I2 (aq)
2IO3^- + 10e + 12H^+ ==> I2 + 6H2O
2I^- ==> I2 + 2e
----------------------------------
Multiply equation 1 by 1 and equation 2 by 5. Add them. That give an equation that is TWICE what you wanted so divide all of the coefficients by 2 and you'll have it.