Chemical Reaction Science 10 lesson Fourth quarter

Science 10 lesson 4th quarter

1. The learner should be able to:
1.Write chemical equations
2.Apply the principles of conservation of mass to chemical
reactions
3.Classify reactions according to the different types
4.Identify the factors that affect reaction rates and explain
them according to collision theory
5.Explain how the factors affecting rates of chemical
reactions are applied in food preservation and materials
production, fire control, pollution, and corrosion

2. The process by which one or more substances are changed into one or more
differentsubstances

4. Distinguish evidences
of chemical reaction

5. How do you know if a
certain change that has
taken place involves a
chemical reaction?

7. Scenarios
1.Aballooninflateswhentiedtoasealedcontainerwithagas-producing
substance.
2.Abright,colorfulflameappearswhenrubbingtwostickstogether.
3.Acakeriseswhilebakingandbecomesfirmaftercooling.
4.Ametalobjectturnsgreenafterbeingleftoutsideformonths.
5.Asparkling,fizzydrinkbubbleswhenopened.
6.Aflowerchangescolorwhenexposedtosunlight.
7.Aredcabbageturnsbluewhenmixedwithcertainhousehold
chemicals.
8.Acandleburnswithayellowflamewhenusingregularwax,butablue
flamewhenusingparaffinwax.
9.Acloudysolutionbecomesclearafteraddingadropoflemonjuice.
10.Apieceofpaperturnsbrownwhenexposedtoairandwater.

8. Group 1
Group 2
Group 3
Group 4
Group 5

9. 1.Production of light
2.Evolution of gas
3.Temperature change
4.Change in intrinsic properties (color, odor)
5.Formation of precipitate

11. 1.Whatobservablechangescanbeseenormeasuredwhenvinegarandbaking
sodaaremixedtogether,indicatingachemicalreactionhastakenplace?
2.Howcantheproductionofcarbondioxidegasbedetectedormeasuredinthe
vinegarandbakingsodareaction,providingevidenceofachemicalreaction?
3.InthescenariowhereCO2isusedtoputoutaflame,howcantheabsenceor
reductionoftheflame'slightandheatoutputbeconsideredasevidenceofachemical
reactionoccurringbetweenCO2andtheflame'ssource?
4.Whatphysicalchangescanbeobservedintheballoonwhenitcapturesthe
carbondioxidegasproducedbythevinegarandbakingsodareaction,servingas
evidenceofachemicalreaction?
5.HowcantherateofCO2gasbeingcapturedintheballoonbeusedasan
indicatorofthereactionratebetweenvinegarandbakingsoda,providingevidenceof
achemicalreactionoccurringinthisscenario?

13. https://youtu.be/Eg64S0DhAaI?si=9dCIeU8v-vMzWiUm
https://youtu.be/_Ct5uRiw-K8?si=d1kTl7yOjPNCaN6E
Change in temperature during a chemical reaction (youtube.com)
Demonstration: Precipitation Reaction of Potassium Iodide and Lead
Nitrate (youtube.com)

14. Phlogiston theory –( George Ernst Stahl, 17
th
century)
When a material burns, it releases a substance
known as phlogiston.
Theory of oxidation (Antoine Lavoisier)
–debunked the phlogiston theory
-instead of releasing phlogiston, a material
accurately burns as it reacts with oxygen

15. 1.Whichofthefollowingbestdescribesa
commonobservablechangewhena
chemicalreactionoccurs?
A.Acolorchangeinasolution
B.Anincreaseintemperature
C.Adecreaseinthevolumeofagas
D.Alloftheabove

16. 2.Whatisapossiblemethodtodetecttheproduction
ofcarbondioxidegasduringthereactionbetween
vinegarandbakingsoda?
A.Measuringthemassofthereactantsbeforeand
afterthereaction
B.Observingtheformationofbubblesinthemixture
C.Analyzingtheinfraredspectrumofthemixture
D.TestingthepHchangeinthemixture

17. 3.Whichofthefollowingisadirectconsequence
ofthereactionbetweenCO2andaflame,
providingevidenceofachemicalreaction?
A.Adecreaseintheflame'sbrightness
B.Anincreaseintheflame'scolortemperature
C.Adecreaseintheflame'ssize
D.Anincreaseintheflame'senergyoutput

18. 4.Inthereactionbetweenhydrogengasandoxygen
gastoproducewater,whatevidencecanbeobserved
toconfirmtheoccurrenceofachemicalreaction?
A.Acolorchangeinthegasmixture
B.Theformationofdropletsduetocondensation
C.Thereleaseofheatandlightintheformofasmall
explosion
D.Adecreaseinthetotalpressureofthesystem

19. 5.IntheDietCokeandMentosexperiment,what
evidencecanbeobservedtoconfirmthepresenceofa
chemicalreaction?
A.Theformationofasolidprecipitate
B.Theproductionofanewgasthatwasnotinitially
present
C.Asignificantchangeinthetemperatureofthe
mixture
D.Acolorchangeinthemixture

20. Instructions:
1.CutasmallpieceofStyrofoamandplaceitinacontainer.
2.Pourasmallamountofacetoneintothecontainer.
3.ObservetheinteractionbetweentheacetoneandStyrofoam.
NotethedissolvingorsofteningoftheStyrofoaminthe
acetone.
4.Discusshowacetoneisasolventcapableofbreakingdown
thepolymerstructureofStyrofoam,resultingintheobserved
change.

21. Distinguish between
reactants and products
Write a chemical reaction
Apply the concept of Law of
Conservation of Mass in
balancing chemical
equations

22. To write a word equation,
1.Write the names of the reactants to the leftof
the arrow separated by plus signs;
2.Write the names of the products to the right of
the arrow, also separated by plus signs.
Reactant + Reactant Product + Product

23. Methane + Oxygen Carbon dioxide + Water

25. Iron + Oxygen Iron(III) Oxide

26. Hydrogen Peroxide Water and Oxygen

27. Write the formulas of the reactants to the
left of the yields sign (arrow) and the
formulasof the products to the right.
Askeleton equation is a chemical equation that
does not indicate the relative amounts of the
reactants and products.
▪Here is the equation for rusting:
▪Fe + O
2Fe
2O
3

28. A catalystis a substance that speeds up
the reaction but is not used up in the
reaction
Without catalyst With Catalyst

30. To write a balanced chemical equation,
1.Write the skeleton equation
2.Use coefficients to balance the equation so that it
obeys the law of conservation of mass.
Remember you want the same number of atoms of
each element on each side of the equation.

33. Write a balanced chemical equation for the
reaction in which sodium hydroxide and
calcium bromide react to produce solid
calcium hydroxide and sodium bromide. (The
reaction occurs in water.)
NaOH(aq)+CaBr
2(aq) Ca(OH)
2(s)+NaBr(aq)
2NaOH(aq)+CaBr
2(aq) Ca(OH)
2(s)+2NaBr(aq)

34. Write a skeleton
equation
Count atoms
Add/adjust
coefficients
Reduce coefficients
to lowest possible
ratio
Check your work

35. _____NaClO
3→____ NaCl + __O
2

36. Magnesium and Hydrogen Chloride produce Hydrogen and
Magnesium Chloride
Calcium Hydroxide and Lithium Chloride produce Lithium
Hydroxide and Calcium Chloride
Decompose Copper (II) oxide into Copper and Oxygen
Aluminum and Iron (III) oxide produce iron and aluminum oxide
combustion of Butane (C
4H
10) in air to produce carbon dioxide
and water

38. Classify reactions according to
their types, based on how atoms
are grouped or regrouped
Classify chemical reactions

39. 1.EnriqueandLizacomebythemselvestoadanceandendup
A.Fightingandignoringeachotherallnight
B.Dancingwitheachotherallnight
2.EnriqueandLizacometogethertoadancebutgetinafightbecauseLizais
staringlovelyatLuisandthen
A.Leavebythemselves
B.Reconcileanddancingwitheachotherallnight
3.EnriqueandLizacometogethertoadance,butEnriquefindsJasmineto
dancewiththen
A.Lizaisleftbehind
B.LizalooksforLuistodancewith

40. 4.EnriqueandLizaaredateforthepromnightaswellas
LuisandJasminebutLuisaskedLizatodancewithhim
A.EnriquedidnotallowLizatodancewithhim
B.Theyswitchdates
5.LizaandJasminearebestfriends,EnriqueisLiza’s
boyfriendbutwhenEnriquesawJasmine
A.EnriquecourtsJasmine(whileheisinrelationshipwith
Liza)thentheybecameloverstoo
B.EnriqueignoredJasminebecauseheisjealousofheras
Liza’sbestfriend

43. Chemical
Reactions
Synthesis
Decomposition
Single
Replacement
Double
Replacement
Combustion

44. Each group has guide card and 4
examples of chemical reaction in
strips. Paste the strip to where it
should belong. Collaborate with
your peers as to why it belongs
to a certain category. Post your
output in the board when done.

45. Group 1
1.C
8H
18+ 12.5 O
2→ 8 CO
2+ 9 H
2O
2.HF (aq) + NaOH (aq) → NaF(aq) + H
2O
3.NH
4Cl (aq) + NaOH (aq) → NH
3(g) + NaCl (aq) + H
2O
4.FeS+ 2 HCl → FeCl
2+ H
2S
Group 2
1.RCOOH + NH
3→ RCONH
2 + H
2O
2.CaCO
3+ HCl → CaCl
2+ H
2O + CO
2
3.Cl
2+ 2 KI → 2 KCl+ I
2
4.H
3C
6H
5O
7(aq) + 3 NaOH (aq) → Na
3C
6H
5O
7(aq) + 3 H
2O
Group 3
1.C
6H
14+ 11/2 O
2→ 6 CO
2+ 7 H
2O
2.CH
3COOH (aq) + NaOH (aq) → CH
3COONa (aq) + H
2O
3.Zn + 2 HCl → ZnCl
2+ H
2
4.H
2O
2→ H
2O + O
2

46. Group 4
1.HCl + NaOH → NaCl + H
2O
2.CaCO
3+ HCl → CaCl
2+ H
2O + CO
2
3.CuO+ H
2→ Cu + H
2O
4.CaC
l2(aq) + Na
2SO
4 (aq) → CaSO
4(s) + 2 NaCl (aq)
Group 5
1.C
8H
18+ 12.5 O
2→ 8 CO
2+ 9 H
2O
2.2 KClO
3→ 2 KCl+ 3 O
2
3.Zn + 2 HCl → ZnCl
2+ H
2
4.AgNO
3(aq) + NaCl (aq) → AgCl (s) + NaNO
3(aq)

47. A + B AB
Synthesis Reactions

48. Two or more reactants
produce one product
Examples:
NH3+ HCl 
NH4Cl
H2+ O2 H2O
Ag + S Ag2S
Al + Cl2 AlCl3

49. AB A + B
Decomposition Reactions

50. One reactant produces
two or more products
Examples
Ag2OAg +O2
PCl5 PCl3 +Cl2
H2O2H2O +O2
CuOCu +O2

51. AB+ C AC + B
Single Replacement

52. One element replaces
another element
Must consult the activity
series

53. One element and one
compound producing a
different element and
compound
Examples
Fe + H
3(PO
4) H
2+ Fe
3(PO
4)
2
H
2 + CuO Cu + H
2O
Zn + HCl H
2+ ZnCl
2
Cl
2+ KBr Br
2+ KCl

54. AB+ CD AD + CB
Double Replacement

55. A double-replacement reactionis a
chemical change involving an
exchange of positive ions
between two compounds.
Examples:
Al(NO
3)
3+ NaOH Al(OH)
3
+ NaNO
3
PbCl
2+ Li
2SO
4PbSO
4+
LiCl
ZnBr
2+ AgNO
3Zn(NO
3)
2
+ AgBr
BaCl
2+ KIO
3Ba(IO
3)
2+
KCl

56. Three main products of a double replacement
reaction
Precipitate (solubility table)
Water
Gas

57. A special kind of double replacement that
takes place when an acid and base react with
each other.
Sodium hydroxide (a base) reacts with
ammonium chloride (salt) to form sodium
chloride, hydrochloric acid, and water.

58. A combustion reaction
Chemical change
Element or a compound reacts with oxygen
Producing energy in the form of heat and light

59. A hydrocarbon reacts with oxygen to produce
carbon dioxide and water
Examples:
CH
4+ O
2CO
2+ H
2O
C
6H
12O
6+ O2CO
2+ H
2O

61. Identify the factors affecting
reaction rates

63. LM page 425 -429

64. Effective collisions between molecules, which
result in formation of new products, only occur
when the ff. 2 conditions are met:
a.The colliding molecules should possess a
minimum kinetic energy, known as activation
energy, to start a chemical reaction.

65. Effective collisions between molecules, which
result in formation of new products, only occur
when the ff. 2 conditions are met:
b. The reactant molecules should be in correct
orientation when they collide.

66. https://youtu.be/brIzBE6bzFc?si=3D1SJR1z5_U
5TWCM
(1968) Chemical Reaction Car -YouTube
Science in a Snap: Make a Baking Soda and
Vinegar Car | STEAM | Ford (youtube.com)

67. Analyze effect of chemical
reactions on life and environment

68. Explain how the factors affecting rates of
chemical reactions are applied in
(7 minutes)
Group 1 food preservation
Group 2 materials production
Group 3 fire control
Group 4 pollution
Group 5 Corrosion

69. After discussion ,Each group member picks a
number from 1 to 5.
All students who pick number 1 will form a
new group, same with 2, 3, 4, 5.
Each member discusses/shares to the new
group everything they have learned from
their previous group. (7 minutes)

70. With your new group, make another
discussion how acid rain, a chemical reaction
causes destruction in our environment. Take
notes.(10minutes)
1.What natural processes can contribute to acid rain?
2.How is acid rain produced?
3.What adverse effect can acid rain pose on living organisms and the environment?
4.Who should be responsible for cleaning up the pollution problem?
5.What measures are taken to address the problem

71. Go back to your original group and share
everything you have learned from your new
group. Choose 1 question you like to discuss
within the group, other members do the
same.(10 minutes)
1.What natural processes can contribute to acid rain?
2.How is acid rain produced?
3.What adverse effect can acid rain pose on living organisms and the environment?
4.Who should be responsible for cleaning up the pollution problem?
5.What measures are taken to address the problem

73. Create a two-stanza poem that emphasizes the benefits and drawbacks of
chemical reactions. Reflect upon the marvels they bring and the potential
risks they pose, while considering the knowledge we've acquired in this
field. In your poetic expression, encourage a harmonious coexistence with
nature and acknowledge the crucial role of chemical reactions in shaping our
future.