In order to balance Fe2O3 + H2SO4 = Fe2(SO4)3 + H2O you'll need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type of atom you have you can only change the coefficients (the numbers in front of atoms or compounds) in order to balance the equation.
Important tips for balancing chemical equations:
- Only change the numbers in front of compounds (the coefficients). - Never change the numbers after atoms (the subscripts). - The number of each atom on both sides of the equation must be the same for the equation to be balanced.
For a complete tutorial on balancing all types of chemical equations, watch my video:
Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).