Untitled Lesson

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Types of Chemical Reactions POGIL

Do atoms rearrange in predictable patterns during chemical reactions?

Why?
Recognizing patterns allows us to predict future behavior. Weather experts use patterns to predict
dangerous storms so people can get their families to safety. Political analysts use patterns to predict
election outcomes. Similarly, chemists classify chemical equations according to their patterns to help
predict products of unknown but similar chemical reactions.

Model 1 – Types of Reactions

Set A _______________________

Set B _______________________

4Fe(s) + 3O2(g) → 2Fe2O3(s)

MgCO3(s) → MgO(s) + CO2(g)

N2(g) + 3H2(g) → 2NH3(g)

8Li2S(s) → 16Li(s) + S8(s)

2SO2(g) + O2(g) → 2SO3(g)

2H2O(l) → 2H2(g) + O2(g)

MgO(s) + H2O(l) → Mg(OH)2(aq)

2KClO3(s) → 2KCl(s) + 3O2(g)

P2O5(g) + 3H2O(l) → 2H3PO4(aq)

2Na2O2(s) → 2Na2O(s) + O2(g)

SO3(g) + H2O(l) → H2SO4(aq)

(NH4)2CO3(s) → 2NH3(g) + H2O(l) + CO2(g)

Set C _______________________

Set D _______________________

2FeCl3(aq) + 3Zn(s) → 2Fe(s) + 3ZnCl2(aq)

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

2Al(NO3)3(aq) + 3Ca(s) → 3Ca(NO3)2(aq) + 2Al(s) 2HNO3(aq) + Mg(ON)2(aq) →

Mg(s) + CuSO4(aq) → MgSO4(aq) + Cu(s)

Mg(NO3)2(aq) + 2H2O(l)

2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)

Na2CO3(aq) + CaCl2(aq) →

Cl2(g) + 2NaBr(aq) → 2NaCl(aq) + Br2(l)

CaCO3(s) + 2NaCl(aq)

ZnBr2(aq) + F2(g) → ZnF2(aq) + Br2(l)

FeS(s) + 2HCl(aq) → H2S(g) + FeCl2(aq)

HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)

FeBr3(aq) + K3PO4(aq) → FePO4(s) + 3KBr(aq)

1.The chemical equations in Model 1 contain the phase notations (s), (l), (g), and (aq). Match

each symbol with its meaning.

dissolved in water

liquid

solid

gas

2.Based on the examples provided, which two sets of reactions in Model 1 typically involve ions

dissolved in water (A, B, C, and/or D)?

3. Based on the examples provided, which two sets of reactions in Model 1 typically involve

gases and/or solids?

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4.Match each description below to one of the reaction sets (A, B, C, or D) from Model 1.

________________________

Ionic compounds dissolved in water switch partners.

________________________

One compound breaks into elements or smaller
compounds.

________________________

Two or more elements or compounds combine to form
one product.

________________________

Part of an ionic compound is removed and replaced by
a new element.

5.Define the following terms as they are commonly used in the English language.

Synthesis –

Decomposition –

Replacement –

6.The four sets of chemical reactions shown in Model 1 have the following general names.

Discuss within your group which name belongs to which set of chemical reactions. Write the
name in the appropriate place in Model 1.

Single Replacement Reaction

Synthesis Reaction

Double Replacement Reaction

Decomposition Reaction

7.Can two elements be used as reactants for a synthesis reaction? If yes, give at least one

example from Model 1 to support your answer.

8.Can two compounds be used as reactants for a synthesis reaction? If yes, give at least one

example from Model 1 to support your answer.

9.What types of substances (elements or compounds) are seen in the products of

decomposition reactions? Use examples from Model 1 to support your answer.

10.Choose one example from the set of synthesis reactions in Model 1.

a.Write the chemical reaction in reverse.

b.Label the reaction written in part a with one of the reaction types in Model 1.

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Model 2 – A Fifth Type of Reaction: Combustion Reaction

Examples of Combustion Reactions:

2 C4H10(g) + 13 O2(g) → 8 CO2(g) + 10 H2O(g)

2 Mg (s) + O2(g) → 2 MgO (s)

2 C7H14(l) + 21 O2(g) → 14 CO2(g) + 14 H2O(g)

C10H8(s) + 12 O2(g) → 10 CO2(g) + 4 H2O(g)

S (s) + O2(g) → SO2(g)

11. All of the chemical equations shown in Model 2 are called combustion reactions.

a. Define combustion as it is commonly used in the English language.



b. Based on your definition of combustion, what do you think you would observe
during a combustion reaction?

12. A hydrocarbon is a molecule made up of two types of atoms.

a. Based on the name “hydrocarbon,” what two elements do you think make up this
type of molecule?



b. Circle all of the hydrocarbons that you see in Model 2.

13. What similarity do you notice between all of the reactions in Model 2?

14. With you group, write a summary statement about how to identify a combustion

reaction from its equation AND in real life.

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15. Identify each of the reactions below as synthesis (S), decomposition (D), single

replacement (SR), double displacement (DR) or combustion (C). If a reaction can be
classified in multiple ways, write down all possible classifications.

______

K2O(s) + H2O(l) → 2 KOH(aq)

______

2 MgCl2(aq) + Na2CO3(aq) → 2 NaCl(aq) + MgCO3(s)

______

2 Al2O3(s) → 4 Al(s) + 3 O2(g)

______

Cu(NO3)2(aq) + Zn(s) → Cu(s) + Zn(NO3)2(aq)

______

CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)

______

H2SO4(aq) + 2 NaOH(aq) → Na2SO4(aq) + 2 H2O(l)

______

2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g)

______

2 O2(g) + N2(g) → N2O4(g)

______

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)

______

2 NaF(s) → 2 Na(s) + F2(g)

16. Fill out the chart below with a general equation for each type of reaction. Synthesis and

combustion have been filled out for you. Use the synthesis general equation as an
example for how to do the other three.

Type of Reaction

General Equation

Synthesis

A + B → AB

Decomposition

Single Replacement

Double Displacement

Combustion

------ + O2→ -----------------------

After compleing this POGIL activity, make sure you have learned the following:

•Define synthesis reaction, decomposition reaction, single replacement reaction, double
displacement reaction, combustion reaction.

•Identify the type of reaction when given a complete chemical reaction or general
formula/equation.

•Recognize a combustion reaction based on observations

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Types of Chemical Reactions worksheet

These are the same reactions that you balanced in the previous unit. If you need more practice,
balance them again here.

Type of Reaction

__________________ 1)

____ N2 + ____ H2→ ____ NH3

__________________ 2)

____ KClO3→ ____ KCl + ____ O2

__________________ 3)

____ NaCl + ____ F2→ ____ NaF + ____ Cl2

__________________ 4)

____ H2 + ____ O2→ ____ H2O

__________________ 5)

____ Pb(OH)2 + ____ HCl → ____ H2O + ____ PbCl2

__________________ 6)

____ AlBr3 + ____ K2SO4→ ____ KBr + ____ Al2(SO4)3

__________________ 7)

____ CH4 + ____ O2→ ____ CO2 + ____ H2O

__________________ 8)

____ C3H8 + ____ O2→ ____ CO2 + ____ H2O

__________________ 9)

____ C8H18 + ____ O2→ ____ CO2 + ____ H2O

__________________ 10) ____ FeCl3 + ____ NaOH → ____ Fe(OH)3 + ____NaCl

__________________ 11) ____ P + ____O2→ ____P2O5

__________________ 12) ____ Na + ____ H2O → ____ NaOH + ____H2

__________________ 13) ____ Ag2O → ____ Ag + ____O2

__________________ 14) ____ S8 + ____O2→ ____ SO3

__________________ 15) ____ K + ____ MgBr → ____ KBr + ____ Mg

__________________ 16) ____ H2O + ____ O2→ ____ H2O2

__________________ 17) ____ NaBr + ____ CaF2→ ____ NaF + ____ CaBr2

__________________ 18) ____ H2SO4 + ____ NaNO2→ ____ HNO2 + ____ Na2SO4