AnswersTN-Physical Science SC 26-27 For CreditIntroduction to Chemical Reactions

Acids and Bases in Solution Answers

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Which is formed by positive ions from a base and negative ions from an acid?

A
salt
B
vinegar
C
soap
D
carbonate
2
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The equation shows reactants to a neutralization reaction.Ca2+ + OH– + H+ + NO

Question illustration
A
H+ binds with NO to make a salt.
Option A
B
H+ binds with Ca2+ to make an acid.
C
H+ binds with OH– to make water.
D
H+ binds with Ca2+ to make a base.
3

A solution has a pH of 8. Which best describes the solution?

A
a strong acid
B
a strong base
C
a weak acid
D
a weak base
4

Which solution has the greatest number of hydroxide ions?

A
baking soda, pH = 9
B
milk, pH = 6
C
tomato juice, pH = 3.5
D
vinegar, pH = 2
5

Carla is using a fertilizer that contains nitric acid. How is nitric acid classified?

A
strong acid
B
weak acid
C
strong base
D
weak base
6

Apple juice has a lower pH than black coffee. Which best explains the relationship?

A
Apple juice has fewer hydrogen ions than black coffee.
B
Apple juice has more hydrogen ions than black coffee.
C
Apple juice has the same number of hydroxide ions as black coffee.
D
Apple juice has more hydroxide ions than black coffee.
7

A student uses red litmus paper to test the pH value of different solutions. Which would result in a color change of the litmus paper?

A
soap
B
vinegar
C
lemon juice
D
antifreeze
8

Which refers to a measure of how acidic or basic a solution is?

A
pH
B
solubility
C
reactiveness
D
hardness
9

Heartburn is a form of indigestion felt as a burning sensation in the chest when stomach acid comes back up into the esophagus. Some people take an antacid to relieve heartburn.

A
The antacid is basic and will neutralize the base entering the esophagus.
B
The antacid is basic and will neutralize the acid entering the esophagus.
C
The antacid is acidic and will raise the pH of the esophagus.
D
The antacid is acidic and will lower the pH of the esophagus.

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