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Chemical Reactions Reaction Types. Write and classify balanced chemical equations from written descriptions of reactions. Include: polyatomic ions Predict.

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Presentation on theme: "Chemical Reactions Reaction Types. Write and classify balanced chemical equations from written descriptions of reactions. Include: polyatomic ions Predict."— Presentation transcript:

1 Chemical Reactions Reaction Types

2 Write and classify balanced chemical equations from written descriptions of reactions. Include: polyatomic ions Predict the products of chemical reactions, given the reactants and type of reaction. Include: polyatomic ions Additional KEY Terms

3 Chemical equation – contains all necessary info about a reaction (like a recipe). + +

4 The Law of Conservation of Mass: In any chemical reaction matter cannot be created or destroyed. We call this equation unbalanced because the atoms are not conserved. H 2 (g) + O 2 (g) H 2 O (g) H O HHH O 22 HH O HH O

5 Balancing Rules: 1.You cannot change the formula of any reactant or product. 2.You can only change the coefficients in front of the reactants and products. H2OH2O3

6 HCl + MgBr 2 MgCl 2 + HBr H: 1H: 1 Cl: 1 Cl: 2 Mg: 1 Br: 2 Br: 1 BALANCED 2 (2) = 2 2

7 K(NO 3 ) + Mg Mg(NO 3 ) 2 + K K: 1K: 1 NO 3 : 1 NO 3 : 2 Mg: 1 BALANCED 2 (2) = 2 2

8 Solid potassium oxide and chlorine gas react to produce potassium chloride and oxygen gas. potassium oxide chlorine potassium chloride K 2 O + Cl KCl + O (s) (g) oxygen

9 Many reactions are similar. Chemists have classified the 5 types of reactions. BIG PICTURE IDEA: If you know the reactants - you can guess the type of reaction AND predict the products.

10 Synthesis reactions Decomposition reactions Single replacement reactions Double replacement reactions Combustion reactions Key Words

11 Synthesis Reactions (Combination): 2 or more substances react to form a single substance. A + B C K + Cl 2 KCl Fe + O 2 Fe 2 O

12 Decomposition Reactions: A single compound splits apart, into two or more simpler compounds. C A + B CO 2 CO + O 2 Al 2 S 3 Al + S

13 Single Replacement Reactions: One element replaces another element in a compound. More active elements replace less active elements. A + BC AC + B I 2 + CuCl Cl 2 + CuI Ba + K(NO 3 ) K + Ba(NO 3 )

14 Double Replacement Reactions: 2 compounds split and exchange positive ions AB + CD AD + CB BaF 2 + LiBrBaBr 2 + LiF HCl + AlBr 3 HBr + AlCl

15 Combustion Reactions: Oxygen reacts with a carbon compound to produce water, carbon dioxide and heat. C x H y + O 2 CO 2 + H 2 O C 7 H 6 O + O 2 CO 2 + H 2 O C 3 H 8 + O 2 CO 2 + H 2 O

16 Synthesis or combinationA + B C DecompositionC A + B Single replacementA + BC B + AC Double replacement AC + BD AD + BC Combustion reactions C x H y + O 2 CO 2 + H 2 O

17 CAN YOU / HAVE YOU? Write and classify balanced chemical equations from written descriptions of reactions. Include: polyatomic ions Predict the products of chemical reactions, given the reactants and type of reaction. Include: polyatomic ions


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