ACS General Chemistry - Redox & Electrochemistry Exam Questions with Correct Answers
Latest Update 2026/2027
What is the product in all reactions between strong acids and strong bases? - Answers Water
What is the Arrhenius acid-base definition? - Answers An acid is a substance with H in its
formula that dissociates in water to produce H3O+.
A base is a substance with OH in its formula that dissociates in water to produce OH-.
How does neutralization occur in Arrhenius acids and bases? - Answers The H3O+ and OH-
combine to form H2O.
What does a large Ka indicate? - Answers Stronger acid, more dissociation
Give examples of strong acids. - Answers Hydrohalic acids: HCl, Hbr, HI
Give examples of weak acids. - Answers Hydrohalic acid HF, carbolylic acids (XCOOH), acids
where H is not bonded to O or a halogen, oxoacids where number of oxygens is greater than or
equal to the number of ionizable protons
Give examples of strong bases. - Answers M2O, MOH, where M = Group 1 metal.
MO, M(OH)2, where M = Group 2 metal. ... Soluble metal hydroxides.
Give examples of weak bases. - Answers Many with electron-rich nitrogen. NH3, amines
What is the Bronsted-Lowry acid-base definition? - Answers An acid is a species that donates a
proton.
A base is a species that accepts a proton. Must contain lone pair of electrons to bind H+.
How does an acid base reaction proceed? - Answers In the direction in which a stronger acid
and stronger base form a weaker acid and a weaker base. Strong-->weak. This is because of
competition to the proton.
What is amphiprotic? - Answers Accepts proton in some cases, donates in other cases.
Is the rate of a reaction related to whether or not a reaction stops at completion or stops at
equilibrium? - Answers NO
What happens if K>Q? - Answers There will be an excess of products.
What happens if Q>K? - Answers There will be an excess of reactants.
What is the oxidation number of an ion? - Answers The charge on the ion is equal to the
oxidation number.
, What is the oxidation number of a Mg ion? - Answers 2+
What is the sum of oxidation numbers in a neutral compound? - Answers Zero
What is oxygen's oxidation number, usually? - Answers -2
What is hydrogen's oxidation number when bonded to a nonmetal? - Answers +1
What is hydrogen's oxidation number when bonded to a metal? - Answers -1
What happens to the rate of reaction as a reaction proceeds? - Answers It slows down
What does a cation of a weak base + anion of a strong acid produce? - Answers Acidic solution
What does a small highly-charged metal cation + anion of strong acid produce? - Answers
Acidic solution
What does an anion of a weak acid + cation of a strong base produce? - Answers Basic solution
What does the process of oxidation involve? - Answers Loss of electrons.
The oxidizing agent steals electrons from the oxidized species.
Oxidation number decreases.
What does the process of reduction involve? - Answers Gain electrons.
The reducing agent donates electrons to the reduced species.
Oxidation number increases.
Where does oxidation take place? - Answers Anode
Where does reduction take place? - Answers Cathode
What happens if coefficients change for a half-reaction? - Answers The potential stays the same.
What happens in electrolysis? - Answers Electrical work is added to a system to cause a non
spontaneous redox reaction.
What is a voltaic cell? - Answers Electrochemical cell. Spontaneous reaction, the system does
work on the surroundings
What is an example of a voltaic cell? - Answers All batteries
What is the ΔG for a voltaic cell? - Answers ΔG < 0
How does a galvanic cell work? - Answers Some of the difference in free energy between higher
energy reactants and lower energy products is converted into electrical energy. The species in
Latest Update 2026/2027
What is the product in all reactions between strong acids and strong bases? - Answers Water
What is the Arrhenius acid-base definition? - Answers An acid is a substance with H in its
formula that dissociates in water to produce H3O+.
A base is a substance with OH in its formula that dissociates in water to produce OH-.
How does neutralization occur in Arrhenius acids and bases? - Answers The H3O+ and OH-
combine to form H2O.
What does a large Ka indicate? - Answers Stronger acid, more dissociation
Give examples of strong acids. - Answers Hydrohalic acids: HCl, Hbr, HI
Give examples of weak acids. - Answers Hydrohalic acid HF, carbolylic acids (XCOOH), acids
where H is not bonded to O or a halogen, oxoacids where number of oxygens is greater than or
equal to the number of ionizable protons
Give examples of strong bases. - Answers M2O, MOH, where M = Group 1 metal.
MO, M(OH)2, where M = Group 2 metal. ... Soluble metal hydroxides.
Give examples of weak bases. - Answers Many with electron-rich nitrogen. NH3, amines
What is the Bronsted-Lowry acid-base definition? - Answers An acid is a species that donates a
proton.
A base is a species that accepts a proton. Must contain lone pair of electrons to bind H+.
How does an acid base reaction proceed? - Answers In the direction in which a stronger acid
and stronger base form a weaker acid and a weaker base. Strong-->weak. This is because of
competition to the proton.
What is amphiprotic? - Answers Accepts proton in some cases, donates in other cases.
Is the rate of a reaction related to whether or not a reaction stops at completion or stops at
equilibrium? - Answers NO
What happens if K>Q? - Answers There will be an excess of products.
What happens if Q>K? - Answers There will be an excess of reactants.
What is the oxidation number of an ion? - Answers The charge on the ion is equal to the
oxidation number.
, What is the oxidation number of a Mg ion? - Answers 2+
What is the sum of oxidation numbers in a neutral compound? - Answers Zero
What is oxygen's oxidation number, usually? - Answers -2
What is hydrogen's oxidation number when bonded to a nonmetal? - Answers +1
What is hydrogen's oxidation number when bonded to a metal? - Answers -1
What happens to the rate of reaction as a reaction proceeds? - Answers It slows down
What does a cation of a weak base + anion of a strong acid produce? - Answers Acidic solution
What does a small highly-charged metal cation + anion of strong acid produce? - Answers
Acidic solution
What does an anion of a weak acid + cation of a strong base produce? - Answers Basic solution
What does the process of oxidation involve? - Answers Loss of electrons.
The oxidizing agent steals electrons from the oxidized species.
Oxidation number decreases.
What does the process of reduction involve? - Answers Gain electrons.
The reducing agent donates electrons to the reduced species.
Oxidation number increases.
Where does oxidation take place? - Answers Anode
Where does reduction take place? - Answers Cathode
What happens if coefficients change for a half-reaction? - Answers The potential stays the same.
What happens in electrolysis? - Answers Electrical work is added to a system to cause a non
spontaneous redox reaction.
What is a voltaic cell? - Answers Electrochemical cell. Spontaneous reaction, the system does
work on the surroundings
What is an example of a voltaic cell? - Answers All batteries
What is the ΔG for a voltaic cell? - Answers ΔG < 0
How does a galvanic cell work? - Answers Some of the difference in free energy between higher
energy reactants and lower energy products is converted into electrical energy. The species in
