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Chemical Reactions

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Presentation on theme: "Chemical Reactions"— Presentation transcript:

1 Chemical Reactions

2 Review

3 Reactant a substance that enters into a chemical reaction Product a substance that is produced by a chemical reaction

4 Energy Endothermic Reaction A chemical reaction in which energy is absorbed (is a reactant) Examples? Exothermic Reaction A chemical reaction in which energy is released (is a product) Examples?

5 New Material

6 The Dance Synthesis(combination) Decomposition Single-displacement (single-replacement) Double-displacement (double-replacement) Combustion

7 Synthesis A + B AB ___Mg + ___O 2 ___MgO

8 Decomposition AB A + B ___ H 2 O ___ H 2 + ___ O 2

9 Single Replacement A + BC ---> AC + B Mg + 2 H 2 O ---> Mg(OH) 2 + H 2 F KCl CI KF

10 Note: In single replacement reactions, Like replaces like! What this means: metals replace metals or cations, nonmetals replace nonmetals, or anions!!

11 Double Replacement AB + CD ---> AD + CB ___Pb(NO 3 ) 2 + ___KI ---> ___PbI 2 + ___KNO 3 Again, Like replaces like.

12 Combustion a hydrocarbon combines with oxygen gas to produce carbon dioxide and water. C n H n + O 2 H 2 O + CO 2 It is also called burning.

13 Recap Synthesis(combination) Decomposition Single-displacement Double-displacement Combustion AB + C AC + B C n H n + O 2 CO 2 + H 2 O A + B AB AB A + B AB + CD AD + CB

14 Practice

15 __NaOH + __KNO 3 --> __NaNO 3 + __KOH A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

16 __CH 4 + __O 2 __CO 2 + __H 2 O A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

17 __Fe + __NaBr --> __FeBr 3 + __Na A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

18 __CaSO 4 + __Mg(OH) 2 __Ca(OH) 2 + __MgSO 4 A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

19 __NH 4 OH + __HBr __H 2 O + __NH 4 Br A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

20 __Pb + __O 2 __PbO 2 A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

21 __Na 2 CO 3 __Na 2 O + __CO 2 A.Synthesis(combination) B.Decomposition C.Single-replacement D.Double-replacement E.Combustion

22 Questions?


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