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Worksheetsacids and bases lc1 Chem
Total questions: 29
Worksheet time: 15mins
Which of these pH values represent an acid?
4
8
10
12
Milk is a very weak acid. What might its pH value be?
6.5
7.8
4.2
12.2
When an acid is dissolved in water, it turns red litmus paper blue.
True
False
Which of the following is an acid?
vinegar
bleach
sugar in water
starch in water
toothpaste in water
An acid is a solution that contains __________ ions dissolved in water.
positive
negative
The higher the concentration of negative (hydroxide) ions in the solution, the stronger the base is.
True
False
Which of the following pH values represents a base?
2.1
4.6
6.8
8.1
The strongest bases have pH values close to
0
14
7
5
An acid is defined as
A proton acceptor
A proton donor
A sour tasting molecule
An ionic compound
The pH scale measures the concentrations of
An acid
Water
Hydrogen ions
Hydroxide ions
Which word matches this definition "a molecule or other species which can accept a proton or donate an electron pair in reactions"?
Base
Alkali
Acid
Amphoteric
Which word matches this definition "a molecule or other species which can accept a proton or donate a proton"?
Base
Alkali
Acid
Amphoteric
Acids dissociate in water. Which equation below shows the correct dissociation for hydrochloric acid?
HCl (aq) --> H (aq) + Cl (aq)
HCl (aq) --> H+ (aq) + Cl+ (aq)
HCl (l) --> H+ (aq) + Cl- (aq)
HCl (aq) --> H+ (aq) + Cl- (aq)
The oxide of a metal was found to react both with hydrochloric acid and with sodium hydroxide solution. Which one of the following is the best description of the oxide?
acidic
basic
neutral
amphoteric
Which compound is the conjugate base?
HCO3- + HCl ==> H2CO3 + Cl-
HCO3-
HCl
H2CO3
Cl-
NH3 + H2O --> NH4+ + OH-
What is H2O in this reaction?
acid
base
conjugate acid
conjugate base
In the reaction below, H2O is a(n):
H2SO3 + H2O --> H3O+ + HSO3-
base
acid
conjugate acid
conjugate base
Given the equation:
H2SO4 + H2O ↔ H3O+ + HSO4- 1
What is the conjugate acid?
H2SO4
H2O
H3O+
HSO4- 1
What is being donated/accepted between conjugate acid-base pairs?
a hydrogen (H+) ion
a hydroxide (OH-) ion
water
a neutron
According to Arrhenius, what is the definition of an ACID?
a substance that contains hydroxide and ionizes to produce OH-
a substance that contains hydrogen and ionizes to produce H+
a substance that contains hydrogen and ionizes to produce OH-
a substance that contains hydroxide and ionizes to produce H+
According to Bronsted-Lowry, what is the definition of an BASE?
a substance that donates a hydrogen (H+) ion
a substance that donates a hydroxide (OH-) ion
a substance that accepts a hydrogen (H+) ion
a substance that accepts a hydroxide (OH-) ion
An arrhenius acid
produces hydroxide ions in a solution
is a proton donor
produces hydrogen ions in a solution
is a proton acceptor
An arrhenius base
produces hydroxide ions in a solution
is a proton donor
produces hydrogen ions in a solution
is a proton acceptor
An arrhenius base
produces hydroxide ions in a solution
is a proton donor
produces hydrogen ions in a solution
is a proton acceptor
A bronsted lowry acid
produces hydroxide ions in a solution
is a proton donor
produces hydrogen ions in a solution
is a proton acceptor
