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Acids And Bases
Test Description: Review questions about acids and bases.
Instructions: Answer all questions to get your test result.
1) A solution with a pH of 8.0 is
A
neutral
B
a weak base
C
a strong base
D
acidic
2) Which of the following is a value from the pH scale?
A
14.5
B
-14.0
C
-7.0
D
12.0
3) Which of the following values of pH will change red litmus paper blue?
A
7.0
B
6.2
C
13.5
D
3.1
4) Which of the following values of pH will change blue litmus paper red?
A
8.2
B
7.0
C
1.0
D
12.6
5) An acid has
A
high concentrations of hydrogen ions (H+)
B
no hydroxide ions (OH-)
C
low concentrations of hydrogen ions (H+)
D
no hydrogen ions (H+)
6) What is the missing part of the chemical equation? ___________ + base --- salt + water
A
pH
B
H20
C
acid
D
base
7) Which of the following is a basic pH?
A
6.0
B
5.0
C
8.0
D
7.0
8) What will be the outcome of putting litmus paper into rainwater? (look at the pH on your pH scale!)
A
red paper does not change, blue paper turns red
B
red paper turns blue, blue paper does not change
C
red paper does not change, blue paper does not change
D
red paper turns blue, blue paper turns red
9) According to the pH scale, which substance is more acidic than tomato juice? (use your pH scale)
A
lemon juice
B
acid rain
C
ammonia solution
D
milk
10) According to the pH scale, which substance has the lowest hydrogen ion concentration? (the least H+)
A
oven cleaner
B
stomach acid
C
tomato juice
D
distilled water
11) What will be the outcome of putting litmus paper into a mixture of equal parts lemon juice and ammonia solution? (what happens when you mix equal acids and bases with the same strength?)
A
red paper turns blue, blue paper does not change
B
red paper does not change, blue paper does not change
C
red paper does not change, blue paper turns red
D
red paper turns blue, blue paper turns red
12) According to the pH scale, which substance is the weakest base?
A
soap
B
human blood
C
oven cleanser
D
bleach
13) A solution with a pH of 2.0 is
A
a weak acid
B
neutral
C
a strong acid
D
basic
14) A neutral solution has
A
slightly more hydroxide ions than hydrogen ions
B
equal amounts of hydrogen ions and hydroxide ions
C
no hydroxide ions (OH-)
D
no hydrogen ions (H+)
15) If you spilled an acid on the floor the best way to clean it up would be to
A
add a base to it
B
use a disposable spong
C
add salt to it
D
add water to it
16) According to the pH scale, which substance is LESS acidic than acid rain?
A
stomach acid
B
lemon juice
C
milk
D
tomato juice
17) According to the pH scale, which substance has the highest acidity?
A
stomach acid
B
oven cleaner
C
milk
D
distilled water
18) What is pH a measure of?
A
hydrogen-ion concentration
B
density
C
ion concentration
D
solute concentration
19) Distilled water will
A
change blue litmus paper to red.
B
not change red or blue litmus paper.
C
cannot be tested using litmus paper.
D
change red litmus paper to blue.
20) What is the missing part of the chemical equation? acid + base-- salt + ________
A
gas
B
H2O
C
pH
D
salt
*select an answer for all questions
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