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Reaction Review (Medium)
Test Description: Answer the following questions to review for the test.
Instructions: Answer all questions to get your test result.
1) Which of these terms describes a type of chemical reaction that results in heat released to the surroundings?
A
Hyperthermic
B
Endothermic
C
Hypothermic
D
Exothermic
2) Which of these is measured using the pH scale?
A
The concentration of hydrogen ions
B
The number of hydrogen ions
C
The concentration of hydroxide ions
D
The number of hydroxide ions
3) A block of iron will react with acid to produce hydrogen gas. Which of these describes what would happen if you increased the surface area of the iron?
A
The reaction would no longer take place
B
The speed of the reaction would increase
C
The speed of the reaction would decrease
D
The reaction would happen at the same speed
4) 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
hyperthermic
D
endothermic
5) Which of these does not stay the same during a chemical reaction?
A
The total mass of the atoms
B
The mass of each type of atom
C
The total number of each type of atom
D
The arrangement of the atoms
6) Which of these statements best describe the law of conservation of mass proposed by Antoine Lavoisier?
A
Energy can not be created or destroyed
B
Energy occurs in discrete amounts
C
Atoms combine in fixed rations to form compounds
D
Matter can not be created or destroyed
7) What is the definition of “products” in a chemical reaction?
A
When a reaction absorbs heat
B
The result of mixing chemicals in a chemical reaction
C
When a reaction releases heat
D
The chemicals that are added to a chemical reaction
8) Peanut butter has a pH of 6.28. Which of these best describes peanut butter?
A
Weak base
B
Weak acid
C
Strong acid
D
Strong base
9) You mix solution A (70 g) with solution B. When they are mixed, a chemical reaction occurs and you end with a total mass of 190 g). What should the mass of solution B be?
A
90 grams
B
70 grams
C
120 grams
D
190 grams
10) You and your partner combined an acid and a metal. Your observations said that it was an exothermic reaction. What does this mean?
A
Heat/energy was absorbed
B
Mass was lost
C
Mass of gained
D
Heat/energy was released
*select an answer for all questions
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