### Redox equations

I need help understanding how to solve redox equations. If you could explain this to me in simple terms I would really appreciate it. i have a sample problem and can't even get past it. The problem is: K2CrO4 + Mg + HCl to CrCl3 + KCl + MgCl2 + h2O I need to know how to make a balanced equation out of this. Thank you very