1. Glowing, Exploding, Bubbling, Color Change, Precipitates
Reaction Types
Glowing, Exploding, Bubbling,
Color Change, Precipitates

2. II. Writing a Reaction 2NaOH(s) + H2SO4(aq) Na2SO4(s) + 2H2O(l)
A) Reactants
1) What you start with
2) What will react
3) A solid and
something dissolved
in a liquid

3. 2NaOH(s) + H2SO4(aq)Na2SO4(s)+2H2O(l)
A) Products
1) What is produced in a reaction
2) A solid and a liquid
3) If a reaction is a factory, it makes
a product
2NaOH(s) + H2SO4(aq)Na2SO4(s)+2H2O(l)

4. C) Other information about Writing a Reaction
1)  means “yields,” or “produces”
a) Solid sodium hydroxide reacts with
Sulfuric Acid in an aqueous solution
“yields/produces,” solid sodium
sulfate and water.
b) State of matter
- (s) = solid
- (l) = liquid
- (g) = gas
- (aq) = aqueous solution,
solid or liquid mixed with
water, given information

5. III. Reaction Types Decomposition Synthesis Single Replacement
Double Replacement
Combustion

6. Decomposition
1) A single compound breaks down into
2 or more compounds or elements
2) AB  A + B
3) 2NaN3(s)  2Na(s) + 3N2(g)

7. Synthesis
1) Two or more reactants combine to
form one product.
2) A + B  AB
3) 2Na(s) + Cl2(g)  2NaCl(s)

8. Single Replacement
1) The atoms of one element replace the
atoms of another element.
2) A + BX  AX + B
3) 2Li(s) + 2H2O(l)  2LiOH(aq) + H2(g)

9. Double Replacement
1) The positive and negative ions of 2
compounds switch place
2) 2 ions or polyatomic ions trade parts
of themselves with one another
3) AX + BY  AY + BX
4) Ca(OH)2(s) + 2HCl(aq)  CaCl2(s) + 2H2O(l)

10. Combustion
1) Oxygen combines with a substance
and releases energy in the form of
heat and light. (A.K.A. burning)
2) 2H2(g) + O2(g)  2H2O(l)
3) CH4(g) + O2(g)  CO2(g) + H2O(l)