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Chemical Reactions Review
By Elorde Tuliao
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Last updated 3 months ago
22 questions
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Is This a Chemical Reaction?
Ice Melting:
1
Question 1
1.
What are the properties of ice (before it melts)?
1
1
1
Question 4
4.
Explain your answer for the last question
Candles burn:
1
Question 5
5.
What are the properties of this candle?
3
1
1
Question 8
8.
Explain your answer for the last question
Baking Soda and Vinegar Mixing:
1
Question 9
9.
What are the properties of baking soda and vinegar mixing?
1
1
1
Question 12
12.
Explain your answer for the last question
What Happens
Before
a Chemical Reaction?
Ca
+ 2H
2
O
→
Ca
(
O
H)
2
+ H
2
Before
After
1
Question 13
13.
Type the number of Ca (calcium) atoms
before
the reaction
1
Question 14
14.
Type the number of O (oxygen) atoms
before
the reaction
1
What Happens
After
a Chemical Reaction?
Ca
+ 2H
2
O
→
Ca
(
O
H)
2
+ H
2
Before
After
1
Question 16
16.
Type the number of Ca (calcium) atoms
after
the reaction
1
Question 17
17.
Type the number of O (oxygen) atoms
after
the reaction
1
Ca
+ 2H
2
O
→
Ca
(
O
H)
2
+ H
2
Before
After
1
Question 19
19.
What happens during a chemical reaction? What is made?
0
Question 20
20.
1
1
Question 2
2.
Is there evidence of a chemical reaction when ice melts? Choose which evidence below is
in the chemical reaction.
Question 3
3.
Is this a chemical reaction?
A) Yes, this is a chemical reaction.
B) No, this is not a chemical reaction.
Question 6
6.
Question 7
7.
Is this a chemical reaction?
A) Yes, this is a chemical reaction.
B) No, this is not a chemical reaction.
Question 10
10.
Is there evidence of a chemical reaction when ice melts? Choose which evidence below is
in the chemical reaction.
Question 11
11.
Is this a chemical reaction?
A) Yes, this is a chemical reaction.
B) No, this is not a chemical reaction.
Question 15
15.
Type the number of H (hydrogen) atoms
before
the reaction
Question 18
18.
Type the number of H (hydrogen) atoms
after
the reaction
What happens to the atoms that make up the molecules of substances during a chemical reaction?
Question 21
21.
Did any atoms appear or disappear?
Question 22
22.
What do you notice about the number of atoms before and after the chemical reaction?
A) Color change
B) Taste change
C) Temperature change
D) Gas is made
E) Electricity is made
F) Light is made
Is there evidence of a chemical reaction when a candle is burning? Choose which evidence below is
in the chemical reaction.
Select all that apply.
A) Color change
B) Taste change
C) Temperature change
D) Gas is made
E) Electricity is made
F) Light is made
A) Color change
B) Taste change
C) Temperature change
D) Gas is made
E) Electricity is made
F) Light is made