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Reaction Review (mild)
Test Description: Answer the following questions to review for the test.
Instructions: Answer all questions to get your test result.
1) 1. Solution A has a mass of 70 g. Solution B has a mass of 40 g. When they are mixed, a chemical reaction occurs. What should the mass of the final mixture be?
A
70 grams
B
110 grams
C
40 grams
D
11 grams
2) You and your partner combined an acid and a metal. Your observations said that it was an exothermic reaction. What does this mean?
A
Mass was lost
B
Heat/energy was absorbed
C
Heat/ energy was released
D
Mass was gained
3) What ALWAYS happens during a chemical change?
A
The change produces gas
B
The temperature increases
C
The elements and atoms rearrange and form a new substance
D
The color changes
4) What is the definition of “reactants” in a chemical reaction?
A
The chemicals that are added to a chemical reaction
B
When a reaction absorbs heat
C
The result of mixing chemicals in a chemical reaction
D
When a reaction releases heat
5) Which of these statements best describe the law of conservation of mass proposed by Antoine Lavoisier?
A
Atoms combine in fixed ratios to form compounds
B
Energy can not be created or destroyed
C
Energy occurs in discrete amounts
D
Matter can not be created or destroyed
6) Which of these types of reactions absorbs heat from the surroundings?
A
Endothermic
B
Exothermic
C
Neutralization
D
Combustion
7) Milk (pH = 6) is a
A
Strong acid
B
Weak Base
C
Strong Base
D
Weak acid
8) In science class, Max mixes 20 grams of water, 13 grams of acid and 7 grams of baking soda. What should be the total mass of the products? (Think law of conservation of mass)
A
40 grams
B
13 grams
C
7 grams
D
20 grams
9) When a chemical ice pack is activated, the chemicals stored inside react and the pack becomes very cold. Which of these terms describes this type of reaction?
A
Exothermic
B
Hypothermic
C
Endothermic
D
Hyperthermic
10) Which of these terms describes a type of chemical reactions that results in heat being released to the surroundings?
A
Endothermic
B
Hyperthermic
C
Hypothermic
D
Exothermic
*select an answer for all questions
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