Question

Help creating balanced equations?

I'm doing this lab for Chemistry, and the only thing I can't figure out is the balanced equations.

1. Iron (IIII) and Copper (II) Sulfate. It's a decomposition reaction, if that's important to know.
2. Lead (II) Nitrate and Potassium Iodide. This is a synthesis reaction.
3. Magnesium metal and hydrochloric acid. Single replacement.
4. Electrolysis of water. Double replacement.
5. Burning magnesium. Combustion.

Answer 1

If more information is needed, just let me know.

Answer 2

Or at least teach me how to do one, so I can figure out the others.