Balancing Reactions Powerpoint
- 1. Chapter 4 Balancing Chemical Equations Image obtained from creativecommons.org
- 2. Chemical Equation Format Reactants placed on left -> placed to the right of the reactants Products placed on the right Image obtained from creativecommons.org
- 3. The Law of Conservation of Matter Chemical Equations MUST follow the Law of Conservation of Matter. This states that matter can not be created nor destroyed. In other words, you have to have the same number of each element on the reactants side as you do on the product side. Image obtained from creativecommons.org
- 4. Balancing Example F 2 + 2 KCl Cl 2 + 2 KF 2 Fluorine’s are in the reactants, so there must be 2 in the product Placing a 2 in front of KF achieves this Now there are 2 K’s, so a 2 must be placed in front of KCl This also balances the chlorine’s
- 5. Steps to balance a reaction Count the number of atoms of each element on both sides of the arrow. Balance atoms by placing numbers in front of each compound. Check your work by recounting the number of atoms of each element.
- 6. Example 1 Ca(CO 3 ) + NaCl CaCl 2 + Na 2 (CO 3 ) 2 2 2 Products Reactants 2 1 Cl 2 1 Na 3 3 O 1 1 C 1 1 Ca
- 7. Example 2 K(ClO 3 ) KCl + O 2 2 3 2 2 2 2 6 2 6 2 3 O 1 1 Cl 1 1 K Products Reactants
- 8. Example 3 Al 2 O 3 + Li Li 2 O + Al 3 6 2
- 9. Example 4 C 3 H 8 + O 2 CO 2 + H 2 O 3 4 10