TYPE OF CHEMICAL REACTIONS combination decom

chemical reactions

1. GUIDE CARD
A. COMBINATION (SYNTHESIS)
REACTION: reaction when two or more
reactants combine to form a single
product.
The general formula for this reaction is:
A + B → AB
B. DECOMPOSITION REACTION: single
reactant breaks down into simpler ones
(2 or more products)
The general formula for this reaction is:
AB → A + B

2. C.SINGLE DISPLACEMENT
(REPLACEMENT): this is when one
element replace another element from a
compound.
The general formula for this reaction is :
A + BC → AC + B
D. DOUBLE DISPLACEMENT REACTION
(METATHESIS): This when the positive ions
(cations) and negative ions (anions) of
different compounds switch places,
forming two entirely different compounds.
The general formula for this reaction is:
AB + CD → AD + CB

3. E. COMBUSTION (BURNING) REACTION:
This is when oxygen combines with a
hydrocarbon (compound containing
hydrogen and carbon) to form a water and
carbon dioxide.
Example: burning of butane gas:
CH O → CO + HO
₄ ₁₀ ₂ ₂ ₂
F. ACID-BASE REACTION: The other
product is salt.
Example of which is:
HCl + NaOH → NaCl + HO
₂

5. 1.HBr + NaOH NaBr + H
→
2O
2.MgI
2
+ Mn(SO
3
)
2
MgSO
→
3
+ MnI
4
3.CaSO
4
+ Mg(OH)
2
Ca(OH)
→
2
+
MgSO
4

4.FeBr
3
+ Na NaBr + Fe
→
5.CaCO
3 CaO + CO
→
2

6. 1.O
2
+ N
2
NO
→
2
2.H
2O H
→
2 + O
2
3.Li + F
2 LiF
→
4.KClO
3
KCl + O
→
2

5.AgNO
3
+ Cu CuNO
→
3
+
Ag

7. 1.NAOH + KNO
3
NaNO
→
3
+ KOH
2.CH
4 + O
2 CO
→
2 + 2H
2O
3.Fe + NaBr FeBr
→
3 + Na
4.CaSO
4 + Mg(OH)
2 Ca(OH)
→
2 + MgSO
4
5.NH
4OH + HBr H
→
2O + NH
4Br

8. 1.P
4 + O
2 P
→
2O
5
2.NaNO
3
NaNO
→
2
+ O
2
3.C
18
H
18
+ O
2
CO
→
2
+ H
2
O
4.H
2
SO
4
+ NaOH NaSO
→
4
+ H
2
O
5.NiSO
4
+ Li
3
PO
4
Ni
→
3
(PO
4
)
2
+ Li
2
SO
4

9. A chemical equation is a
chemist’s shorthand
reaction.
Reactants are the
starting materials and the
products which are the
resulting substances.

10. TYPES OF CHEMICAL
REACTION

11. TWO OR MORE CHEMICALS
BOND TOGETHER FORMING
ONE NEW SUBSTANCE.
SYNTHESIS / COMBINATION
“THE GET TOGETHER”

12. A B AB
SYNTHESIS / COMBINATION
“THE GET TOGETHER”

13. Na Cl NaCl
₂
SYNTHESIS / COMBINATION
“THE GET TOGETHER”

14. ONE SUBSTANCE BREAKS
DOWN INTO TWO OR MORE
SEPARATE SUBSTANCES.
DECOMPOSITION
“ THE BREAK – UP”

15. AB A B
DECOMPOSITION
“ THE BREAK – UP”

16. HO HO O
₂₂ ₂ ₂
DECOMPOSITION
“ THE BREAK – UP”

17. ONE ELEMENT KNOCKS
ANOTHER ELEMENT OUT
OF A COMPOUND.
SINGLE DISPLACEMENT
“ THE CHEATER”

18. A BC AC B
SINGLE REPLACEMENT
“ THE CHEATER”

19. Zn HCl ZnCl H
₂ ₂
SINGLE REPLACEMENT
“ THE CHEATER”

20. DOUBLE DISPLACEMENT
-THE SWAP
TWO COMPOUNDS SWITCH
IONS WITH EACH OTHER.

21. AB + CD AD + CB
DOUBLE DISPLACEMENT
-THE SWAP

22. BaCl+NaSO BaSO + NaCl
₂ ₂ ₄ ₄
DOUBLE DISPLACEMENT
-THE SWAP

23. OXYGEN WILL ALWAYS
BE A REACTANT.
COMBUSTION
“BURNING” “ EVERYONE LOVES O
₂

24. CH O CO HO
₂ ₂ ₂
COMBUSTION
“BURNING” “ EVERYONE LOVES O
₂

25. CH
4
O
2
CO
2
H
2
O
COMBUSTION
“BURNING” “ EVERYONE LOVES O
₂

26. ACID+BASE WATER +
SALT
ACID-BASE REACTION
HCl + NaOH NaCl + HO
₂

27. “LOVE ISN’T AN OPINION,
IT IS A CHEMICAL
REACTION”

30. 1. Which of the following best describes a chemical
reaction that is the reverse of synthesis, and how does it
contribute to environmental or industrial processes?
A. Combustion – It releases energy by breaking down
hydrocarbons in the presence of oxygen.
B. Decomposition Reaction – It breaks down complex
substances into simpler ones, playing a role in recycling
materials.
C. Double Displacement Reaction – It involves the
exchange of ions between two compounds, forming new
products.
D. Single Displacement Reaction – It replaces one element
in a compound with another, affecting product formation.

31. 2. What do you call to the chemical
reaction in which the hydrocarbon is
combined with oxygen gas?
A. Combination reaction
B. Combustion
C. Double Displacement reaction
D. Single Displacement reaction

32. 3. Which of the following is an example
of a decomposition reaction in real life?
A. Burning wood in a fireplace to
produce heat and light
B. Cooking rice by boiling it in water
C. Using hydrogen peroxide (HO) to
₂ ₂
clean a wound, which breaks down into
water and oxygen gas
D. Rust forming on an iron nail when
exposed to air and moisture

33. 4. Which of the following refers to the
special kind of double displacement
reaction that takes place when an acid
and base react with each other.
A. Acid-Base reaction
B. Combination reaction
C. Combustion
D. Decomposition reaction

34. 5. What do you call to chemical
reaction that happens when one
element replaces another element
from a compound?
A. Combustion reaction
B. Metathesis
C.Single displacement reaction
D.Synthesis

35. Assignment:
Answer the following questions:
1.How do chemical reactions affect our daily lives? Give
at least two real-life examples and explain their
significance.
2.Compare and contrast decomposition and
combination reactions. How do these reactions play a
role in nature or industry?
3.Why is combustion considered both useful and
harmful? Provide examples of its benefits and potential
negative effects on the environment.