Chemical Reactions - The Science Spot Page 2
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3Chemical Reactions
ANSWER KEY
1. Watch the video and then complete the chart.
Teacher notes on next page!
Colors: A = Red, B = Blue, C = Green, D = Yellow
2. Use colored pencils to circle the common atoms or compounds on each side of the equations to help you
determine the type of reaction it illustrates. Use the code below to classify each reaction.
S = Synthesis
D = Decomposition
SR = Single Replacement
DR = Double Replacement
S
S
→ P
→
MgO
P +
O
O
Mg + O
______
2
4
10
______
2
D
D
HgO → Hg +
→ Al + O
O
Al
O
______
2
______
2
3
2
SR
S
+ NaBr → NaCl + Br
→ NH
Cl
H
+ N
______
2
2
______
2
2
3
R
S
DR
→ NaBr
S → CuS + HCl
Na + Br
CuCl
+ H
______
2
______
2
2
SR
S
→ HgCl + O
→
CH
HgO + Cl
C + H
______
2
2
______
2
4
D
S
→
→
SF
KClO
KCl +
O
S
+
F
______
3
2
______
8
2
6
DR
→
BaCl
+ Na
SO
NaCl + BaSO
Note: SO4 is a polyatomic ion.
______
2
2
4
4
T. Trimpe 2010
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