1. Chemical Reactions Introduction LT 5C:Describe how the Law of Conservation of mass determines what reactants and products will be in a reaction. Identify the reactants and the products of a chemical reaction. Determine how many atoms are reacting or being produced, given the formula of a compound using subscripts and coefficients Balance a chemical equation given the reactants and products of a reaction Justify how chemical reactions obey the Law of Conservation of Mass Vocabulary: Chemical Reaction Reactants Products Chemical Equation Law of Conservation of Mass Subscript Coefficient

2. Chemical Equation Definition: Pieces: – Reactants: – Products: Example:

3. Making Salt Find 1 Na and 1 Cl Also find the + and Rearrange until you have NaCl. Reactants: _____ + _____ Products: __________ Chemical Equation: _____________________ Draw the Equation here:

4. Carbon Dioxide! Find 1 C and 2 O. Reactants: C + O 2 Products: CO 2 Reaction Equation: ______________________ Draw the reaction here:

5. Making Water Find 4 H and 2 O Reactants: H 2 and O 2 Products: H 2 O Chemical Equation: _____________________ Draw the reaction here:

6. Subscripts and Coefficients Subscript: Coefficient: Water example:

7. Law of Conservation of Mass Definition: Implication:

8. Potassium Chloride Products: K + Cl2 Reactants: KCl Chemical Equation: _____________________ Draw the equation here:

9. With two products… Reactants: Mg + TiCl 4 Products: Ti + MgCl 2 Chemical Equation: _____________________ Draw the equation here:

10. More Practice…1 Reactants: HgO Products: Hg + O 2 Chemical Equation: _____________________ Draw the equation here:

11. More practice….2 Reactants: KClO 3 Products: KCl + O 2 Chemical Equation: _____________________ Draw the equation here:

12. More practice…3 Reactants: CH 4 + O 2 Products: CO 2 + H 2 O Chemical Equation: _____________________ Draw the equation here: