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Published byEsmond Dorsey Modified over 6 years ago
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Learning Objectives To check our understanding of balanced equations
To recognize four of five types of chemical reactions
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Types of Chemical Reactions
Chemists classify reactions to make it easier to predict the products of reactions.
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Synthesis Reactions Decomposition Reactions Combustion Reactions
Types of Chemical Reactions Double Displacement Reactions Single Displacement Reactions
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1. Synthesis Reactions (getting together)
In a synthesis reaction, two or more reactants combine to produce one new product as follows: X + Y XY
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X + Y XY X + Y XY 1. Synthesis Reactions
The following are examples of Synthesis Reactions: Hydrogen + Oxygen Water X + Y XY Chlorine + Sodium Sodium Chloride X + Y XY
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X + Y XY X + Y XY X + Y XY 1. Synthesis Reactions
Aluminum + Oxygen Aluminum Oxide X + Y XY Iron + Oxygen Iron (II) Oxide X + Y XY e. Zinc + Oxygen Zinc (II) Oxide X + Y XY
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Predict the products in each of the following:
Magnesium + Bromine Magnesium Bromide Calcium + Carbon Calcium Carbide Beryllium + Oxygen Beryllium Oxide
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2. Decomposition Reactions (breaking up)
In a decomposition reaction, a compound breaks down into two or more simpler compounds or elements. XY X + Y
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2. Decomposition Reactions
The following are examples of Decomposition Reactions: Water Hydrogen + Oxygen XY X + Y Potassium Carbonate Potassium oxide + carbon dioxide XY X + Y
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Predict the products in each of the following:
Aluminum Chloride Aluminum + Chlorine Sodium Bromide Sodium + Bromine Sodium Nitride Sodium + Nitrogen
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3. Single Displacement Reactions (cheating)
In a single displacement reaction, one element takes the place of another element in a compound. X + YZ Y + XZ
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The following are examples of Single Displacement Reactions:
Magnesium + Copper (II) Sulfate Copper + Magnesium Sulfate Copper + Silver (I) Nitrate Silver + Copper (I) Nitrate Zinc + Hydrogen Chloride Hydrogen + Zinc (I) Chloride
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The Activity Series Pb + Mg(NO3)2 no reaction
K Na Li Ca Mg Al Zn Fe Ni Sn Pb H Cu Hg Ag Au The Activity Series Only elements higher on the activity series (ie more reactive) are able to displace elements lower on the activity series. Eg. Mg + Pb(NO3)2 Pb + Mg(NO3)2 Pb + Mg(NO3)2 no reaction
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Predict the products in each of the following:
Aluminum + Magnesium Nitrate No Reaction Calcium + Lead (II) Phosphate Lead + Calcium Phosphate Iron + Hydrogen Sulfate Hydrogen + Iron (II) Sulfate
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4. Double Displacement Reactions (swinging)
In a double displacement reaction, the cations in two different compounds exchange places, forming two new compounds. WX + YZ WZ + YX
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The following are examples of Double Displacement Reactions:
Switch Cations Lead (II) Nitrate + Potassium Iodide Potassium Nitrate + Lead (II) Iodide Switch Cations Calcium sulfate + magnesium carbonate magnesium sulfate + calcium carbonate
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Predict the products in each of the following:
Sodium sulfate + barium nitrate Aluminum phosphate + magnesium carbonate
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Classwork / Homework Worksheet Page 239 # 2, 3, 4 Page 243 # 3, 4
H + OH HOH (H2O)
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