Acids and Bases Test
Which expression represents the pH of a solution?
-log[H3O+]
The pH scale in general use ranges from
0-14
What is the pH of a solution whose hydronium ion concentration is 5.03 x 10^-1 M
0.2984
What is the molarity of an hcl solution if 50ml is neutralized in a titrant by 40.0 ml of 0.4 m NaOH?
0.32 M
The antilogarithm of a number, y, is
10 raised to the power of y
What is the concentration of H3O+ ions in pure water?
10^-7 M
What is the product of H3O+ ion and OH- ion concentrations in water?
10⁻¹⁴ M²
What is the pH of a 0.027 M KOH solution?
12.43
What is the OH- concentration whose ph is 12.4
2.5 x 10^-2 M
What is the pH of a neutral solution at 25ºC?
7
What is the hydronium ion concentration in a solution having a pOH of 4.12
7.6 x 10 ^-5
What is the pH of a 10^-5 M KOH solution?
9
Which of the following did Arrhenius theorize?
An acid increases the concentration of OH- ions in solution
The traditional definition of acids is based on the observations of
Arrhenius
Which is a lewis acid but not a bronsted lowry acid
BF3
Whose definition of acids and bases emphasizes the role of protons?
Bronsted and Lowry
In the reaction represented by the equation NH3 + H20 ---> NH4 + OH , H20 is a
Bronsted-Lowry Acid
Which of the following is not a strong acid?
CH3COOH
Which of the following is amphoteric?
H20
The substances produced when KOH neutralizes HCL are
H20 and KCl
Which compound is produced by a neutralization?
H2O(l)
Which of the following is not an oxyacid?
H2O2
Which of the following is a diprotic acid?
H2SO4
Which of the following is a strong acid?
H2SO4
In the reaction represented by the equation HF + H2O = H3O+ + F-, a conjugate acid-base pair is
H3O+ and H2O
Which of the following is a triprotic acid?
H3PO4
Which of the following is a binary acid?
HBr
In the equation HCL(g) + H20(l) ---> H30+(aq) + Cl- (aq), which species is a Bronsted-Lowery acid?
HCL
Which of the following is a chlorous acid?
HClO2
Which of the following is a chloric acid?
HClO3
Which of the following is a perchloric acid?
HClO4
Which of the following is a strong base?
KOH
Whose acid definition is the broadest?
Lewis
In the reaction represented by the equation Ni2 + nh20 ---> [Ni(h20)n] +2 H20 is a?
Lewis Base
Whenever ammonia donates an electron pair to form a covalent bond, it acts as a(n)
Lewis Base
an electron pair acceptor
Lewis acid
An electron-pair donor is a
Lewis base
Which of the following is a weak base?
NH3
A substance that ionizes nearly completely in aqueous solutions and produces h30+ is a
Strong Acid
Which statement about Arrhenius bases is false?
They increase the concentration of hydrogen ions in aqueous solution
Which statement about Arrhenius acids is false?
They increase the concentration of hydroxide ions in aqueous solution
To calculate the ph of a solution whose [OH-] is known, first calculate
[H3O+]
Which of the following is not a reactant in a neutralization reaction?
a salt
How would you classify CH3COOH in the equation below?
a weak acid
Which acid is found in vinegar?
acetic acid
An amphoteric species is one that reacts as a(n)
acid or base
Bases react with
acids to produce salts and water
Acids generally release H2 gas when they react with
active metals
The dilute aqueous solution of a weak base contains
all of the above
The members of a conjugate acid-base pair
appear on opposite sides of the chemical equation
In water, hydroxides of group 2 metals
are all strong bases
In the reaction represented by the equation H2SO4 + H2O = H3O+ + HSO4-, the ion HSO4- acts a(n)
base
In the reaction represented by the equation H3PO4 + H2O = H3O+ + H2PO4-, the ion H2PO4- acts as a(n)
base
Acids react with
bases to produce salts and water
The name of a binary acid
begins with the prefix hydro-
Bases taste
bitter
Aqueous solutions of acids
carry electricity
Aqueous solutions of bases
carry electricity
A species that is formed when a base gains a proton is a
conjugate acid
A species that remains when an acid has lost a proton is a
conjugate base
A Lewis acid is
electron pair acceptor
A Lewis acid is a
electron pair acceptor
The pH of a basic solution is
greater than 7
In the reaction represented by the equation CH3COOH (aq) + H2O(l) = H3O+(aq) + CH3COO- (aq) a conjugate acid-base pair is
h20
Which acid is produced in the stomach?
hydrochloric acid
Which acid is used to pickle metals, process foods, and active oil wells?
hydrochloric acid
A binary acid contains
hydrogen and one other element
An Arrhenius acid contains
hydrogen that ionizes to form hydrogen ions
Arrhenius theorized that a base is a chemical compound that
increase the concentration of hydroxide ions when dissolved in water
Arrhenius theorized that an acid is a chemical compound that
increases the concentration of hydrogen ions when dissolved in water
Dyes with pH-sensitive colors are used as
indicators
A water solution whose pH is 4
is always acidic
If [H3O+] of a solution is less than [OH-], the solution
is always acidic
Compared with acids that have the suffix -ic, acids that have the suffix -ous contain
less oxygen
The reaction represented by the equation Ag+(aq) + 2NH3(aq) --> [AgH3)2]+(aq) is a(n)
lewis acid-base reaction
Which of the following liquids is basic?
milk
An acid-base titration involves a
neutralization reaction
Which acid is used mainly in the manufacture of explosives, rubber, plastics, dyes, and drugs?
nitric acid
Which acid turns yellowish on standing?
nitric acid
During an acid-base titration, a very rapid change in pH
occurs when the amounts of h30+ ions and OH ions are nearly equivalent
In a conjugate acid-base pair, the acid typically has
one more proton than the base
Which of the following liquids is acidic?
orange juice
An oxyacid contains
oxygen, hydrogen, and one other element
Which acid is used to make fertilizers and detergents and is a flavoring agent beverages?
phosphoric
The common logarithm of a number, N, is the
power to which 10 must be raised to equal N
The two members of a conjugate acid-base differ by a
proton
A Brosted-Lowry base is a
proton acceptor
A Brosted-Lowry acid is a
proton donor
A salt is not a
proton donor
Pure water partially breaks down into charged particles in a process called
self-ionization
If a substance has a great tendency to give up protons, its conjugate has a
slight tendency to attract protons
Bases feel
slippery
Acids taste
sour
In the equation CH3COOH + H20 --> H30 + CH3COO, H20 is a weak base and H30 is a weak base and H30 is a
strong acid
The conjugate of a weak acid is a
strong base
An acid ending with the suffix -ic produces an anion with the
suffix -ate
Which acid is manufactured in largest quantity?
sulfuric acid
Which acid is used in batteries?
sulfuric acid
Indicators are classified into three types according to
the pH at which they change color
What process measures the amount of a solution of known concentration required to react with a measured amount of a solution of unknown concentration?
titration
Acetic acid is found in
vinegar
Pure water contains
water molecules, hydronium ions, and hydroxide ions
The conjugate of a strong base is a
weak acid
In the equation HI + H2O = H3O + I-, HI is a strong acid and I- is a
weak base
Many organic compounds, such as codeine, that contain nitrogen are
weak bases
When titrating a weak acid with a strong base the equivalence point
will be above ph of 7