- When you are given two half-equations you will need to join them together.
- The aim is to make the same number of electrons equal the same as each other.

How to combine the half equations

- Step 1: Write the two half equations
- Step 2: Take a note of how many electrons are lost or gained in each half equations and multiply either the one or both equations to make them both have the same number of electrons in their equations
- Step 3: Now multiply the number of products and reactants in each equation by the number that you multiplied the electrons with.
- Step 4: Now combine the equations together and cancel out the electrons as the number of electrons should be the same in each equation.

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