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ASSIGNMENT ON ACIDS, BASES, AND SALTS

Total questions: 50

Worksheet time: 35mins

Name
Class
Date
1.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
2.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

3.

HF is...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

4.

HNO2

a)

a base

b)

a salt

c)

an acid

d)

an ionic compound

5.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
6.

KOH is ...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

7.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
8.

What is the [H+] if the pH is 4.0?

a)

1.0 x 10-10 M

b)

1.0 x 10-4 M

c)

1.0 x 10-14 M

d)

1.0 x 10-7 M

9.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
10.

What is a titration?

a)

when the moles of hydrogen ions is equal to the moles of hydroxide ions

b)

adding a known amount of solution of known concentration to determine the concentration of an unknown

c)

reaction in which an acid and a base react in an aqueous solution to produce a salt and water

d)

the extent of ionization of an acid or base

11.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

c)

saline

d)

ionic

12.

What completely ionizes in solution?

a)

Weak acids

b)

Strong acids

c)

Strong Salts

d)

Neutral salts

13.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
14.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
15.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
16.

When an acid and a base are mixed, what is the reaction called?

a)

Neutralization

b)

Hydrolyzed

c)

Hydro Ionization

d)

A salt and a water reaction

17.

Which acid/base definitions classify acids as donating protons and bases accepting protons?

a)

Arrhenius

b)

Brønsted-Lowry

c)

Lewis

d)

Hall-Higgins

18.

What would the conjugate acid of H2O? (water acting like a base)

a)

OH-

b)

H3O+

c)

H+

19.

What would the conjugate base of HCO3- be?

a)

H2CO3

b)

CO32-

c)

H2CO3-

d)

CO3-

20.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
21.

A Bronsted Lowry acid:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

22.

A Bronsted Lowry base:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

23.

In the equation below, what is the Bronsted Lowry acid (donates H+)?

HCl + NH3 → Cl- + NH4+

a)

HCl

b)

NH3

c)

Cl-

d)

NH4+

24.

Which product in the following equation is a conjugate base?

H2O + HCl → H3O+ + Cl-

a)

Water

b)

Hydrogen chloride

c)

Hydronium

d)

Chloride

25.

What is the conjugate base in the following reaction?

HCO3- + HCl → H2CO3 + Cl-

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

26.
Which has a pH below 7?
a)
Acid
b)
Base
27.
Which has a bitter taste?
a)
Base
b)
Acid
c)
flagella
d)
cila
28.
Turns litmus red
a)
Acids
b)
Bases
c)
All
29.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

30.
What methods can you use to measure the pH of a solution?
a)
Observing color or clarity
b)
Measuring mass or volume
c)
Measuring density or electrical conductivity
d)
Using acid base-indicators or pH meters
31.
Which of the following is most likely to be basic:
a)
Lemon juice
b)
Vinegar
c)
Laundry detergent
d)
Coke
32.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
33.
Why are bases useful as cleaning products?
a)
They dissolve fats and oils
b)
they are corrosive, so they eat anything
c)
they don't mix with water
d)
since bases are slippery, they slip dirt off of surfaces
34.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
35.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
36.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
37.
A hydrogen ion, H+, is the same as a(n):
a)
neutron
b)
electron
c)
proton
d)
hydroxide ion
38.

A Bronsted Lowry acid:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

39.

A Bronsted Lowry base:

a)

donates H+ to another substance

b)

accepts H+ from another substance

c)

produces H+

d)

produces OH-

40.

Which substance is an Arrhenius base

a)

KCl

b)

CH3Cl

c)

KOH

d)

CH3OH

41.

An Arrhenius base yields which ion as the only negative ion in an aqueous solution?

a)

hydride

b)

hydrogen

c)

hydronium

d)

hydroxide

42.

Which of the following would be the strongest acid

a)

NaOH

b)

HF

c)

H2SO4

d)

Ca(OH)2

43.
What does pH measure?
a)
Amount of Oxygen Ions
b)
Amount of Hydrogen Ions
c)
The amount of salt in a solution
d)
The density
44.

Scale that measures how acidic or basic something is.

a)

aH

b)

bH

c)

pH

d)

Hp

45.
Which pH is considered neutral?
a)
1
b)
3
c)
7
d)
14
46.

What is the purpose of an "indicator"?

a)

changes color if a chemical reaction occurs

b)

changes color if a physical change occurs

c)

changes color in the presence of an acid or base

d)

changes color when a salt dissolves in water

47.

What color is phenolphthalein in a base?

a)

colorless

b)

pink

c)

blue

d)

green

48.
What is the purpose of a titration?
a)
To find the pH of an acid
b)
To find the concentration of an unknown acid or base
c)
To find the volume of an unknown acid or base
d)
To find the pH of a base
49.

What technique is shown in this image?

a)

filtration

b)

buretting

c)

indicating

d)

titration

50.
acid + base ₋>
a)
salt + hydrogen
b)
salt + water
c)
salt + carbon dioxide + water
d)
salt

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