Using the half equation or half cell method, one can balance ionic redox equations representing redox reactions occuring in acid or basic/neutral medium.
Split the equations into two halves with one representing the oxidation reaction and the other reduction reaction.
By inspection balance each of the half equations with respect to atoms and charges.
Multiply each half equations with appropriate factors to balance the number of electrons in the two half equations.
Add up the two balanced halves and cancel out species that appear on both sides in the combined equation.
If needed, divide or multiply each of the coefficient in the combined equation by a factor to avoid fractions and express in simple terms.