Reaction Types
Which reaction uses the following general equation?
A + B --> AB
Synthesis
*Give the correct subscripts in simplified form*
K + Cl2 --> ______
KCl
*answer must be in simplified form*
___ Na + ___ Cl2 --> ___ NaCl
_2_ Na + _1_ Cl2 --> _2_ NaCl
This type of reaction releases energy.
Exothermic
How many Hydrogens are listed below?
H2O
2
This type of reaction involves a compound breaking down into elements or smaller compounds.
Decomposition
*Give the correct subscripts in simplified form*
MgO --> ______
Mg + O2
*answer must be in simplified form*
___ K2O --> ___ K + ___ O2
_2_ K2O --> _4_ K + _1_ O2
This type of reaction feels cold to the touch.
Endothermic
How many Chlorines are listed below?
Be(HOCl2)2
4
This type of reaction involves an element switching with another element in a compound.
Single Replacement
*Give the correct subscripts in simplified form*
C2H8 + O2 --> ________
CO2 + H2O
*answer must be in simplified form*
___ Al + ___ F2 —> ___ AlF3
_2_ Al + _3_ F2 --> _2_ AlF3
What is an example application/use for exothermic reactions?
How many Hydrogens are listed below?
NH3 + 2 H2O
7
What type of reaction is shown below:
CH4 + 2MgO --> CO2 + 2MgH2
Double Replacement
*Give the correct subscripts in simplified form*
Li + Br2O --> ______
Li2O + Br2
*answer must be in simplified form*
___ Al + ___ FeO --> ___ Al2O3 + ___ Fe
_2_ Al + _3_ FeO --> _1_ Al2O3 + _3_ Fe
What is an example application/use for endothermic reactions?
Cold packs (other answers could apply)
How many Oxygens are listed below?
Ba(PO4)2 + Na2SO4 + MgO
13
What type of reaction is shown below?
C3H12 + 6O2 --> 3CO2 + 6H2O
Combustion
*Give the correct subscripts in simplified form*
CaF2 + Al2Se3 --> ______
CaSe + AlF3
*answer must be in simplified form*
___ C4H10 + ___ O2 --> ___ CO2 + ___ H2O
_2_ C4H10 + _13_ O2 --> _8_ CO2 + _10_ H2O
Describe the difference between what endothermic and exothermic graphs look like.
Endothermic --> Energy stays higher (absorbing)
Exothermic --> Energy drops (releasing)
How many Oxygens are listed below?
2 Al(NO4)3 + 3 Li2SO4 + Cu2O3
39