1. Conservation of Matter

2. Mass is neither created nor destroyed during a chemical reaction

3. Mass of Reactants = Mass of Products
Reactants Products
Mass of Reactants = Mass of Products

4. Chemical reactions are represented on paper by
chemical equations.

5. How can I tell if the Law of Conservation applies

9. This is a balanced chemical equation!

10. Important Points of the Law
1. In a chemical reaction, the reactants break apart and form new substances (elements and compounds). Nothing added, nothing is lost.
2. Must happen in a closed system!

11. Is this a closed system?

12. Does the Law of Conservation apply to this chemical equation?

14. NOT Balanced

15. C3H8 + 2O2  2H2O Which chemical formulas represent the reactants
Which chemical formulas represent the products?
How many of each atom is present in the reactants?
C -
H -
O -
How many of each atom is present in the products?
C -
H -
O -

16. How can we prove that mass is conserved in a chemical reaction?
Reactants  Products
H20 + Na(HCO3)  CO2 + NaOH + H20
Water + Alka Seltzer  Carbon Dioxide + Sodium Hydroxide + Water

17. Works Cited