Reaction types
Presentation
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Chemistry
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6th - 8th Grade
•
Practice Problem
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Medium
Used 7+ times
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8 Slides • 8 Questions
1
TYPES OF CHEMICAL REACTIONS
5 types of chemical reactions that require balanced equations according to the law of conservation of mass
Synthesis Reaction
Decomposition Reaction
Single-Replacement Reaction
Double Replacement Reaction
Combustion - WE WILL NOT DO ANY COMBUSTION REACTIONS!!!!
Notice the “state of matter” symbols (s=solid, l= liquid, g=gas)
You may also see the symbol (aq), which means the substance is aqueous (dissolved in water)
2
Also called a “combination reaction”
There are 2 reactants and one product
Both the reactants and products can be compounds
What this looks like in a chemical equation:
N2(g) + 3H2(g) → 2NH3(g)
3
Multiple Choice
Without balancing the final equation, predict the products for the synthesis reaction: Li + Cl2 → ?
LiCl2
LiCl
Li2Cl2
Li2Cl
4
Multiple Choice
Write the overall balanced chemical equation for the synthesis reaction:
3Sr + N2 --> ?
3Sr + N2 → SrN2
3Sr + N2 → Sr3N2
3 Sr + N2 → 3Sr3N2
3Sr + N2 --> SrN
5
One reactant breaks down into two or more products.
What this looks like in a chemical equation:
2H2O → 2H2 + O2
6
Multiple Choice
Without balancing the final equation, predict the products for the decomposition reaction:
2PaI5 → ?
2PaI5 → 2Pa + 5I5 +O
2PaI5 → 5I5
2PaI5 → 2Pa
2PaI5 → 2Pa + 2I5
7
Multiple Choice
Write the overall balanced chemical equation below:
2NaCl --> __Na + Cl2
2NaCl --> 2Na + Cl2
2NaCl --> Na + Cl2
2NaCl --> 3Na + Cl2
2NaCl --> 4Na + Cl2
8
A single uncombined element replaces another element in an ionic compound.
What this looks like in a chemical equation:
2FeCl3 + 3Zn → 2Fe + 3ZnCl2
9
Multiple Choice
Without balancing the final equation, predict the products for the Single replacement reaction:
2Al + 6HCl →
2Al + 6HCl → 2AlH2 +Cl3
2Al + 6HCl → 2AlCl3+ 3H2
2Al + 6HCl → 2Al + 3H2Cl3
2Al + 6HCl → 2Cl3+ 3Al H2
10
Multiple Choice
Write the overall balanced chemical equation below:
Cl2 + 2NaBr → 2NaCl + Br2
Cl2 + 2NaBr → 2NaCl + Br2
Cl2 + 2NaBr → 3NaCl + Br2
Cl2 + 2NaBr → 2NaBr2 + Cl
Cl2 + 2NaBr → NaCl + Br2
11
Two reactants exchange ions to form two new products with the same type of chemical bonds. (Metals are written first, and negative ions switch places.)
12
Multiple Choice
Without balancing the final equation, predict the products for the double replacement reaction:
Na2CO3 + CaCl2 →CaCO3 + 2NaCl
Na2CO3 + CaCl2 →CaCO3 + 2NaC
Na2CO3 + CaCl2 →NaO3 + 2NaCl
Na2CO3 + CaCl2 →CaCl3 + 2NaCl
Na2CO3 + CaCl2 →CaCO3 + 2NaCl
13
Multiple Choice
Write the overall balanced chemical equation below:
FeS+ HCl → __HS + __FeCl
FeS + HCl → HS+ FeCl
FeS + 2HCl→ HS + 3FeCl
2FeS + HCl → HS + FeCl2
FeS + 2HCl → HS + FeCl
14
15
16
TYPES OF CHEMICAL REACTIONS
5 types of chemical reactions that require balanced equations according to the law of conservation of mass
Synthesis Reaction
Decomposition Reaction
Single-Replacement Reaction
Double Replacement Reaction
Combustion - WE WILL NOT DO ANY COMBUSTION REACTIONS!!!!
Notice the “state of matter” symbols (s=solid, l= liquid, g=gas)
You may also see the symbol (aq), which means the substance is aqueous (dissolved in water)
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