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Chemical Reactions Test Review
Test Description: Review for the Chemical Reactions Test in Ms Ward's class
Instructions: Answer all questions to get your test result.
1) What evidence would you see in the reaction that would indicate a chemical change has occurred?
A
all listed
B
bubbling
C
color change
D
odor is produced
2) What are the big numbers in front of a formula used to balance a chemical reaction called?
A
superscripts
B
coefficients
C
Coeffective
D
subscripts
3) What indicates compound is dissolved in water?
A
(aq)
B
(l)
C
(s)
D
(H2O)
4) What are used to make neutral ionic compounds?
A
subscripts
B
coeffectives
C
coefficients
D
superscripts
5) What indicates a substance is insoluble in water?
A
(s)
B
(aq)
C
(g)
D
(l)
6) In a formula equation for a chemical reaction, where is a catalyst written?
A
on the products side
B
on the reactants side
C
written above the reaction arrow
D
on both sides of the reaction
7) A triangle above the reaction arrow represents what?
A
change is occuring
B
nothing
C
its a combustion reaction
D
a catalyst or heat was applied
8) What are catalysts or heat in a reaction used for?
A
to fix the reaction
B
to slow down or stop the reaction
C
to speed up the reaction
D
to change what is formed in the reaction
9) What are spectator ions?
A
fans of the reaction
B
ions that, after writing the net ionic equation, are unchanged on both sides of the reaction
C
ions that, after writing the net ionic equation, are changed from one side of the reaction to the other
D
unneccesary for the reaction to take place
10) Which of the following compounds is insoluble in water?
A
NH4Cl
B
KOH
C
PbCrO4
D
KNO3
11) Which of the following compounds is insoluble in water?
A
KNO3
B
K2SO4
C
K2CrO4
D
Ag2CO3
12) Which of the following compounds is insoluble in water?
A
NaNO3
B
CuSO4
C
BaSO4
D
NH4OH
*select an answer for all questions
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