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WorksheetsRedox Reactions and Net Ionic Equations
Total questions: 25
Worksheet time: 25mins
Reduction/Oxidation (Redox) reaction
A reaction in which electrons are transferred from one chemical to another, but no chemical bonds have been altered in the process.
The representation of a chemical reaction using chemical formulas to indicate what substances are being altered or created during chemical reactions.
The chemicals that are being chemically changed in a chemical reaction. Found on the left side of the arrow in a chemical equation.
The chemicals resulting from a chemical reaction. Found on the right side of the arrow in a chemical equation.
Net ionic equation
The ions in a chemical reaction that remain aqueous throughout the entire reaction.
The chemical equation that represents the ions that are participating in the actual chemistry. The spectator ions are removed from the overall equation to reveal the net ionic equation.
An insoluble (solid) substance that is formed from two soluble (aqueous) substances.
Both matter and mass are conserved throughout a chemical reaction.
Given the balanced ionic equation representing a reaction: 2Al(s) + 3Cu2+(aq) → 2Al3+(aq) + 3Cu(s) Which half-reaction represents the reduction that occurs?
Al → Al3+ + 3e-
Al3+ + 3e- → Al
Cu → Cu2+ + 2e-
Cu2+ + 2e- → Cu
Another name for a "oxidation-reduction" reaction is
chemical reaction
neutralization reaction
redox reaction
nuclear reaction
In the reaction: Zn + Cu2+ → Zn2+ + Cu, the Cu2+
is reduced
is oxidized
Lead(II) oxide undergoes a number of different redox reactions. In which of the following reactions is lead(II) oxide,PbO, not reduced?
A
B
C
D
Three reactions are shown below. NO+O3 →NO2 +O2 2C +O2 → 2CO 2MgO+O2 → 2MgO Which row correctly describes the process each reactant molecule undergoes?
A
B
C
D
Magnesium reacts with iron(III) oxide in the following reaction.
A
B
C
D
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
As an element is oxidized, its oxidation number
increases as electrons are gained
decreases as electrons are gained
decreases as electrons are lost
increases as electrons are lost
In the reaction: Zn + Cu2+ → Zn2+ + Cu,
is reduced
is oxidized
Oxidation is the _________ of electrons.
loss
gain
sharing
transfer
In the reaction: Zn + Cu2+ → Zn2+ + Cu,
is reduced
is oxidized
Given the equation:
2 Al + 3 Cu2+ → 2 Al3+ + 3 Cu
The reduction half-reaction is
Al → Al3+ + 3e–
Al + 3e– → Al3+
Cu2+ + 2e– → Cu
Cu2+ → Cu + 2e–
Given the reaction for the corrosion of aluminum: 4 Al + 3 O2 → 2 Al2O3 Which half-reaction correctly represents the oxidation that occurs?
Al + 3e– → Al3+
Al → Al3+ + 3e–
O2 + 4e– → 2 O2–
O2 → 2 O2– + 4e-
Which half-reaction correctly represents reduction?
Ag → Ag+ + e–
F2 → 2 F– + 2e–
Au3+ + 3e–→ Au
Fe2++ e– → Fe3+
Half-reactions can be written to represent all
double-replacement reactions
neutralization reactions
fission and fusion reactions
oxidation and reduction reactions
Which of the following best describes a redox reaction?
A reaction where electrons are transferred between species.
A reaction where protons are transferred between species.
A reaction where neutrons are transferred between species.
A reaction where atoms are rearranged without electron transfer.
In the reaction: @@ ext{Zn} + ext{Cu}^{2+} ightarrow ext{Zn}^{2+} + ext{Cu}@@, which species is oxidized?
Zn
Cu
Cu^{2+}
Zn^{2+}
What is the net ionic equation for the reaction between sodium chloride and silver nitrate?
@@ ext{Na}^+ + ext{Cl}^- ightarrow ext{NaCl}@@
@@ ext{Ag}^+ + ext{Cl}^- ightarrow ext{AgCl}@@
@@ ext{Na}^+ + ext{NO}_3^- ightarrow ext{NaNO}_3@@
@@ ext{Ag}^+ + ext{NO}_3^- ightarrow ext{AgNO}_3@@
Which of the following is a characteristic of a reduction process?
Gain of electrons
Loss of electrons
Gain of protons
Loss of protons
In the balanced equation @@ ext{2Al} + ext{3Cu}^{2+} ightarrow ext{2Al}^{3+} + ext{3Cu}@@, what is the oxidation half-reaction?
@@ ext{Al} ightarrow ext{Al}^{3+} + 3e^-@@
@@ ext{Cu}^{2+} + 2e^- ightarrow ext{Cu}@@
@@ ext{Al}^{3+} + 3e^- ightarrow ext{Al}@@
@@ ext{Cu} ightarrow ext{Cu}^{2+} + 2e^-@@
Which of the following statements is true about net ionic equations?
They include all ions present in the reaction.
They only include the ions that participate in the reaction.
They include only the spectator ions.
They are the same as molecular equations.
In a redox reaction, what happens to the oxidation number of the element that is reduced?
It increases.
It decreases.
It remains the same.
It becomes zero.
Which of the following reactions is an example of a redox reaction?
@@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@
@@ ext{NaOH} + ext{HCl} ightarrow ext{NaCl} + ext{H}_2 ext{O}@@
@@ ext{CaCO}_3 ightarrow ext{CaO} + ext{CO}_2@@
@@ ext{NH}_3 + ext{H}_2 ext{O} ightarrow ext{NH}_4^+ + ext{OH}^-@@
