1. Symbolic notation used by chemists to represent a chemical reaction.
Chemical Equation
Symbolic notation used by chemists to represent a chemical reaction.

2. In a chemical equation, everything to the left of the arrow
Reactant – starting materials
In a chemical equation, everything to the left of the arrow

3. In a chemical equation, everything to the right of the arrow
Product – ending materials
In a chemical equation, everything to the right of the arrow

4. Number in front of a formula. Tells how many formula units are present.
Coefficient

5. Balanced chemical equation
Demonstrates conservation of mass. Same # of each element on both sides.
Balanced chemical equation

6. Chemical equations demonstrate conservation of
mass, charge (& energy)
Chemical equations demonstrate conservation of

7. Synthesis
Reaction with 1 product

8. Reaction with 1 reactant
Decomposition
Reaction with 1 reactant

9. Single Replacement
Reaction of 1 element with 1 compound to produce a new element & a new compound

10. Reaction of 2 compounds to produce 2 new compounds.
Double Replacement
Reaction of 2 compounds to produce 2 new compounds.

11. Reaction with oxygen. One of the reactants must be O2.
Combustion
Reaction with oxygen. One of the reactants must be O2.

12. Decomposition
AB  A + B

13. Synthesis
A + B  AB

14. Single Replacement
AX + B  A + BX

15. Double Replacement
AX + BY  AY + BX

16. To predict if a single replacement reaction will occur,
You must compare the reactivity of the free element with the corresponding element in the compound.
Use Table J. If the stand-alone element is above the corresponding element in the compound, the reaction will take place.
To predict if a single replacement reaction will occur,

17. 2Na + MgCl2  2NaCl + Mg Na + MgCl2  ?
Compare Na & Mg (both metals). Na is above Mg in Table J so the rxn occurs.
2Na + MgCl2  2NaCl + Mg
Na + MgCl2  ?

18. Do the following reactions occur?
Br2 + HF: Compare Br2 & F2
Mg + ZnCl2: Compare Mg & Zn
Na + HCl: Compare Na & H2
Ag + LiBr: Compare Ag & Li No
Yes
Yes No

19. Stoichiometry Problems
Use the relationship in the balanced equation to predict amounts consumed or produced.
Use the equation to set up a ratio.
Stoichiometry Problems

20. 2 Moles of hydrogen! X 4 4/2 = X/1 so X = 2
2Na + 2H2O  2NaOH + H2 How many moles of hydrogen are produced when 4 moles of sodium reacts completely?
4/2 = X/1 so X = 2