Chemical Formulas & Balancing Chemical Equations
This video provides tips on how to balance more complicated chemical reactions. It also provides an example of balancing the combustion reaction of ethylene, C₂H₄.
This video highlights the differences between empirical, molecular, and structural chemical formulas. Empirical formulas show the simplest whole-number ratio of atoms in a compound. Molecular formulasshow the number of each type of atom in a molecule. Structural formulas show the arrangement of the molecule.
These videos explain how to balance redox reactions in basic solutions using the following steps: (1) separate the net reaction into two separate half reactions (oxidation and reduction), (2) balance the atoms first under acidic conditions using H+ and H2O, and (3) balance the charges by adding electrons to the side of the chemical equation with the highest oxidation state. Once the electrons in both half-reactions are equal, the two reactions may be combined together to form the net reaction. To neutralize the acid, OH- ions are added to both sides of the equation.