AnswersChemistryAcid-Base Reactions

Practice Test Answers

8 verified answers
1
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Why is citric acid added to food?

A
to add bitterness
B
to add sweetness
C
to add color
D
to add tartness
2
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How does litmus paper identify a base?

A
A base turns red litmus blue.
B
A base turns blue litmus red.
C
A base turns yellow litmus blue.
D
A base turns orange litmus red.
3

The pH of lemon juice at 298 cap k is found to be 2 point 3 2 What is the concentration of cap h sub 3 cap o raised to the plus power ions in the solution? Use open bracket cap h sub 3 cap o raised to the plus power close bracket is equal to 10 raised to the negative pH power

A
9 point 5 5 times 10 squared cap m
B
1 point 0 5 times 10 to the negative 3 power cap m
C
4 point 7 9 times 10 to the negative 3 power cap m
D
2 point 0 9 times 10 squared cap m
4

Which salt is produced when NH sub 4 OH reacts with HNO sub 3 ?

A
NH sub 4 NO sub 2
B
KNO sub 2
C
NaNO sub 3
D
NH sub 4 NO sub 3
5

The two products that are formed when a solution of HNO sub 3 and a solution of NaOH react are water and

A
NaNO sub 2 .
B
NaNO sub 3 .
C
NaHNO sub 3 .
D
NaHNO .
6

Which of these equations correctly expresses the self-ionization of water?

A
cap h sub 2 cap o plus cap h sub 2 cap o left right arrow 2H sub 3 cap o raised to the plus power
B
cap h sub 2 cap o plus cap h sub 3 cap o raised to the plus left right arrow cap h sub 2 cap o plus OH raised to the negative power power
C
cap h sub 2 cap o plus cap h sub 2 cap o left right arrow cap h sub 3 cap o raised to the plus plus OH raised to the negative power power
D
cap h sub 2 cap o plus cap h sub 2 cap o left right arrow 2 OH raised to the negative power
7

A substance is dissolved in water and produces hydronium ions. This occurs when hydrogen ions move from the substance to associate with water molecules. Which term best matches the behavior of this substance?

A
Bronsted-Lowry base
B
Arrhenius base
C
Arrhenius acid
D
Bronsted-Lowry acid
8

What is the Arrhenius definition of a base?

A
A substance that increases cap h sub 2 cap o raised to the plus power concentration when it is dissolved in water.
B
A compound that donates protons.
C
A compound that accepts protons.
D
A substance that increases OH raised to the negative power concentration when it is dissolved in water.

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