Classifying Chemical Reactions

1
Classifying Chemical Reactions

• 5 types of chemical reactions

2
Synthesis

• involves two or more substances combining to make
  a more complex substance
• A          B      ---gt       AB
• C(s) O2(g) ----gt CO2(g)
• CaO(s) H2O(l) ----gt Ca(OH)2(s)

3
Decomposition

• one substance is broken down into two or more,
  simpler substances
• AB       ----gt      A             B
• Pb(OH)2(cr) ----gt PbO(cr) H2O(g)
• 2Ag2O(cr) ----gt 4Ag(cr) O2(g)

4
Single Replacement (Displacement)

• One element replaces another in a compound
• A BC ----gt B AC
• element compound --gt element compound
• 2Al(s) 3CuCl2(aq) --gt 2AlCl3(aq) 3Cu(s)
• Cl2(g) KBr(aq) --gt KCl(aq) Br2(l)

5
Double Replacement (Displacement)

• compounds in this type of reaction exchange
  partners
• AB CD ----gt CB AD
• Compound Compound --gt Compound Compound
• AgNO3(aq) NaCl(aq) ----gt AgCl(s) NaNO3(aq)

6
Combustion

• Burning always have oxygen as reactant and CO2
  and H2O as products
• hydrocarbon oxygen ----gt carbon dioxide and
  water
• C3H8(g) 5O2(g) ----gt 4H2O(g) 3CO2(g)

7
Practice predict type of reaction and then
write the products

• 2H2(g) O2(g) ? ?
• H2SO4(aq) 2NaOH(aq) ? ?
• CuCl2(aq) ? ?
• Zn(s) H2SO4(aq) ? ?