1. Chemical Reactions

2. SC Standards PS-4.6 Distinguish between chemical changes (including the formation of gas or reactivity with acids) and physical changes (including changes in size, shape, color, and/ or phase). PS-4.7 Summarize characteristics of balanced chemical equations (including conservation of mass and changes in energy in the form of heat-that is, exothermic or endothermic reactions). PS-4.8 Summarize evidence (including the evolution of gas; the formation of a precipitate; and/ or changes in temperature, color, and/ or odor) that a chemical reaction has occurred. PS-4.9 Apply a procedure to balance equations for a simple synthesis or decomposition reaction. PS-4.10 Recognize simple chemical equations (including single replacement and double replacement) as being balanced or not balanced. PS-4.11 Explain the effects of temperature, concentration, surface area, and the presence of a catalyst on reaction rates.

3. Signs of a Chemical Reaction Production of light Formation of a gas Formation of a precipitate Color change Change in temperature

4. Law of Conservation of Mass mass is neither created nor destroyed in a chemical reaction 4 H 2 O 4 H 2 O 4 g32 g 36 g total mass stays the same atoms can only rearrange

5. Chemical Equations A+B  C+D REACTANTS PRODUCTS

6. Chemical Equations

7. Types of Chemical Reactions

8. Synthesis the combination of 2 or more substances to form a compound only one product A + B  AB

9. Synthesis H 2 (g) + Cl 2 (g)  2 HCl(g)

10. Decomposition a compound breaks down into 2 or more simpler substances only one reactant AB  A + B

11. Decomposition 2 H 2 O(l)  2 H 2 (g) + O 2 (g)

12. Single Replacement one element replaces another in a compound metal replaces metal (+) nonmetal replaces nonmetal (-) A + BC  AC + B

13. Single Replacement Cu(s) + 2AgNO 3 (aq)  Cu(NO 3 ) 2 (aq) + 2Ag(s)

14. AB + CD  AD + CB Double Replacement ions in two compounds “change partners” cation of one compound combines with anion of the other

15. Double Replacement Pb(NO 3 ) 2 (aq) + K 2 CrO 4 (aq)  PbCrO 4 (s) + 2KNO 3 (aq)

16. Double Replacement Reaction Lab