WorksheetsCh. 19 (Acids and Bases)
Total questions: 20
Worksheet time: 5hrs 0mins
According to the BrØnsted-Lowry theory, a base is a(n) ______________.
electron pair acceptor
hydrogen ion donor
hydrogen ion acceptor
electron pair donor
Which one of the following could not be a BrØnsted-Lowry acid?
H2O
H3O+
NH4+
BF3
When HClO4 ionizes in water, ClO4- is the ______________.
Acid
Base
Conjugate acid
Conjugate base
H2SO4 is a ______________.
Monoprotic acid
Monoprotic base
Diprotic acid
Diprotic base
pH is defined as ______________.
Log [H+]
−Log [H+]
Log [OH-]
-Log [OH-]
When a solution has a pH of 4, what is the pOH of that solution?
10
4
18
7
A Lewis acid is a(n) ____.
electron pair donor
hydrogen ion donor
electron pair acceptor
substance that contains a hydroxide group
A solution with a small Kb is a ____.
weak acid
weak base
strong acid
strong base
What is the pH of a neutral solution such as pure water?
0
7
14
1.0 × 10–14
Solutions that resist changes in pH are called ____.
titrants
salts
conjugate pairs
buffers
What is the pH of 0.250M HBr, a strong acid?
0.60
0.80
13.4
13.2
What is the conjugate acid in the following equation?
HCl(s) + H2O → H3O+(aq) + Cl–(aq)
Cl–
H3O+
H2O
HCl
Diprotic succinic acid (H2C4H4O4) is an important part of the process that converts glucose to energy in the human body. What is the Ka expression for the second ionization of succinic acid?
Sulfuric acid is a strong acid. What is true about its conjugate base?
Its conjugate base is amphoteric.
Its conjugate base is strong.
Its conjugate base is weak.
No conclusion can be made regarding the strength of the conjugate base.
Why are Ka values all small numbers?
The concentration of water does not affect the ionization.
The equilibrium is not stable.
The solutions contain a high concentration of ions.
The solutions contain a high concentration of un-ionized acid molecules.
A substance that contains hydrogen and produces H+ ions in aqueous solution is a(n) ______________.
Acid
Base
Salt
Water
Neutralization is the chemical process in which ______________.
Sodium ions react with chloride ions to form sodium chloride
Hydrogen ions react with chloride ions to form hydrogen chloride
Sodium ions react with hydroxide ions to form sodium hydroxide
Hydrogen ions react with hydroxide ions to form water
At the equivalence point of a strong acid-strong base titration, what is the pH?
3
5
7
9
Which of the following acids is the strongest in the chart?
formic acid
cyanoacetic acid
lutidinic acid
barbituric acid
A chemical equation for the ionization of an acid uses a single arrow to the right (→) to separate the reactant and product sides of the equation. Which of the following is true?
The arrow does not indicate relative strength.
The ionizing acid is half ionized.
The ionizing acid is strong.
The ionizing acid is weak.
