Transcript Types of chemical Reactions

TYPE ONE
Combination:
When two or more simple
compounds combine to
form a more complicated
one
A + B ---> AB
Ex:
8 Fe + S8 ---> 8 FeS
1. 2H2(g) + O2(g) ----> 2H2O(g)
2. C(s) + O2(g) ----> CO2(g)
3. CaO(s) + H2O(l) ----> Ca(OH)2(s)
TYPE TWO
Single Displacement:
When one element
trades places with
another element in a
compound
A + BC ---> AC + B
Ex:
Mg + 2 H2O ---> Mg(OH)2 + H2
1. Cu + 2AgNO3 → 2Ag +
Cu(NO3)2
2. Fe + Cu(NO3)2 → Fe(NO3)2 + Cu
3. Ca + 2H2O → Ca(OH)2 + H2
4. Zn + 2HCl → ZnCl2 + H2
TYPE THREE
Double Displacement:
When the anions and
cations of two different
molecules switch places,
forming two entirely
different compounds
AB + CD ---> AD + CB
Ex:
Pb(NO3)2 + 2 KI ---> PbI2 + 2 KNO3
1. KOH + H2SO4 ---> K2SO4 + H2O
2. FeS + HCl ---> FeCl2 + H2S
3. NaCl + H2SO4 ---> Na2SO4 + HCl
4. AgNO3 + NaCl ---> AgCl + NaNO3
TYPE FOUR
Decompostion:
When complex
molecule breaks
down to make
simpler ones
AB ---> A + B
Ex:
2 H2O ---> 2 H2 + O2
1. C12H22O11(s) ----> 12C(s) + 11H2O(g)
2. Pb(OH)2(cr) ----> PbO(cr) + H2O(g)
3. 2Ag2O(cr) ----> 4Ag(cr) + O2(g)
TYPE FIVE
Combustion:
1. CH4(g) + 2O2(g) ----> 2H2O(g) + CO2(g)
When oxygen combines
with another compound to
form water and carbon
dioxide
2. 2C2H6(g) + 7O2(g) ----> 6H20(g) + 4CO2(g)
ABC (hydrocarbon)+ XO2
ZCO2
--->YH2O+
Ex:
C10H8 + 12 O2 ---> 10 CO2 + 4 H2O
3. C3H8(g) + 5O2(g) ----> 4H2O(g) + 3CO2(g)
SPECIAL CASE #1 ACID BASE
Acid/Base:
1.
When an acid and base
react with each other. The
2.
H+ ion in the acid reacts
with the OH ion in the base,
causing the formation of
water
3.
HA + BOH ---> H2O + BA
Ex:
HBr + NaOH ---> NaBr
+ H 2O
4.
HCl + NaOH ---> NaCl + H2O
H2SO4 + 2KOH ---> K2SO4 + 2H2O
2HNO3 + Ca(OH)2 ---> Ca(NO3)2 + 2H2O
CH3COOH + NaOH ---> NaOOCCH3 + H2O
SPECIAL CASE #2 REDOX
When reactants and products charge changes.
1 Fe + 3 NaBr --> FeBr3 + 3 Na
Fe0 + 3(Na+ Br- -) --> Fe 3+ (Br -)3 + 3 Na 0
Iron oxidizes charge goes up
Sodium reduces charge goes down
YES TO A QUESTION MEANS STOP
1) Does your reaction have oxygen
as one of it's reactants and carbon
dioxide and water as products?
Combustion reaction
2) Does your reaction have two (or
more) chemicals combining to form
one chemical?
Combination reaction
3) Does your reaction have one large
molecule falling apart to make
several small ones?
Decomposition reaction
4) New compound forms and a new
element remains?
Single replacement reaction
5) If you haven't answered "yes" to
any of the questions above.
Double displacement reaction
Special Cases:
#1 Acid Base a form of double
displacement Water is Product and
Reactants have
HA + B(OH) > H2O + BA
#2 Redox – All Combination, single
replacement, and some double
displacements, and decompositions
(Does an valence change value)
PRACTICE :
LIST WHAT TYPE THE FOLLOWING REACTIONS ARE
1)
2)
3)
4)
5)
6)
7)
NaOH + KNO3 --> NaNO3 + KOH
CH4 + 2 O2 --> CO2 + 2 H2O
1 Fe + 3 NaBr --> FeBr3 + 3 Na
CaSO4 + Mg(OH)2 --> Ca(OH)2 + MgSO4
NH4OH + HBr --> H2O + NH4Br
Pb + O2 --> PbO2
Na2CO3 --> Na2O + CO2
ANSWERS TO PRACTICE
1) double displacement
2) combustion – redox
1) NaOH + KNO3 --> NaNO3 + KOH
2) CH4 + 2 O2 --> CO2 + 2 H2O
Carbon Oxidized;Oxygen reduced
3) 2 Fe + 6 NaBr --> 2 FeBr3 + 6 Na
redox iron Oxidized; Sodium reduced
4) CaSO4 + Mg(OH)2 --> Ca(OH)2 + MgSO4
3) single replacement 4) double displacement
5) acid-base
6) Combining
-
Oxidized; Oxygen reduced
redox lead
7) decomposition
5) NH4OH + HBr --> H2O + NH4Br
6) Pb + O2 --> PbO2
7) Na2CO3 --> Na2O + CO2