1. (See Chapter 10.1) Chemical Reactions

2. Using pp. 296-300 of A Natural Approach to Chemistry, Answer as many of the following questions as you can in the next 10 minutes!!

3. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both?

4. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Chemical reaction – the process of chemical change

5. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Chemical equation – expression that describes the changes happening in a chemical reaction

6. NOT NOTES – JUST THINK Why would we want to use chemical equations instead of writing out what happens in words?

7. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Reactants – starting materials or substances in a chemical reaction; The things that react!!

8. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Products – substances produced by chemical reaction The things that are made!!

9. NOT NOTES – JUST THINK How is this similar to products you normally think of?

10. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? “+” separates the reactants or products from each other

11. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? “  ” “changes into” “reacts to form”

12. NOT NOTES – JUST THINK This next one isn’t in the book. What do you think (g), (l), (s), and (aq) stand for?

13. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? (g) – gas (l) – liquid (s) – solid (aq) – aqueous (dissolved)

14. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Law of Conservation of Mass – the total mass of the reactants and the total mass of the products is the same

15. NOT NOTES – JUST THINK WHY is the mass the same?

16. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Law of Conservation of Mass – the total mass of the reactants and the total mass of the products is the same; Aka atoms CAN’T be created nor destroyed, just moved between molecules

17. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Coefficient tells you how many molecules there are

18. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Subscript tells you how many atoms of that element are in one molecule

19. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Unbalanced chemical equation – chemical equation that does not satisfy LoCoM

20. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? Balanced chemical equation – chemical equation that does satisfy LoCoM

21. What is a chemical reaction? What is a chemical equation? What are reactants? What are products? In a chemical equation, what does a “+” mean? In a chemical equation, what does a “  ” mean? What do (g), (l), (s), and (aq) stand for? What is the Law of Conservation of Mass? In a chemical equation, what does a coefficient mean? In a chemical equation, what does a subscript mean? What is an unbalanced chemical equation? What is a balanced chemical equation? When balancing chemical equations, can we change coefficients, subscripts, or both? ONLY COEFFICIENTS CAN CHANGE!

22. Laboratory In groups of 3-4, work on the Law of Conservation of Mass Laboratory. Wear goggles and gloves!!

23. Homework Work on the Chemical Rxns Practice