Download Si: Week 13: Session 1: 11/14/16 Fill in the blank using the word

Si: Week 13: Session 1: 11/14/16
1. Fill in the blank using the word bank:
reduction
oxidation
simultaneously
oxidizing agent
reduced
reducing agent
decrease
increase
oxidized
a.
b.
c.
d.
e.
____________ is the loss of electrons.
Reduction results in a(n) ____________ in oxidation number.
____________ is the gain of electrons.
Oxidation results in a(n) ____________ in oxidation number
The ____________ takes electrons from the substance being oxidized, thus
making it ____________.
f. Reduction and oxidation occur ____________.
g. The ____________ gives electrons to the substance being reduced, thus making
it ____________.
2. Write a balanced molecular equation for the reaction between KMnO4 and KI in basic
solution. The skeleton ionic equation is:
MnO4– (aq) + I– (aq)  MnO42– (aq) + IO3– (aq)
3. Fill in the blank using the word bank:
system
voltaic cell
anode
electrodes
electrolytic cell
cathode
released
electrolyte
absorbed
surroundings
a. A(n) ____________ (galvanic cell) uses a spontaneous redox reaction to generate
electrical energy.
b. A(n) ____________ uses electrical energy to drive a nonspontaneous reaction.
c. In a voltaic cell, energy is ____________ from a spontaneous redox reaction.
d. In an electrolytic cell, energy is____________ to drive a nonspontaneous
reaction.
e. Both types of cells are constructed using two ____________ placed in an
____________ solution.
f. In a voltaic cell, the ____________ does work on the surroundings.
g. The ____________ is the electrode at which oxidation occurs.
h. In an electrolytic cell, the ____________do work on the system.
i. The____________ is the electrode at which reduction occurs.
4. Fill in the blank using the word bank:
positive
right
salt bridge
electrolyte
left
negative
electrode
inactive
active (2)
circuit
ions
a. The external circuit that connects each half-cell is called a ____________. This
allows____________ to flow through both half-cells.
b. Each half-cell consists of a(n) ____________ in a(n) ____________ solution.
c. The anode is the____________ electrode in a voltaic cell.
d. The cathode is the ____________electrode in a voltaic cell.
e. A voltaic cell is shown with the anode on the ____________ and the cathode on
the ____________.
f. A(n) ____________ electrode is a(n)____________ component in its half-cell and
is a reactant or product in the overall reaction
g. A(n) ____________ electrode provides a surface for the reaction and completes
the ____________.
5. In on half-cell of a voltaic cell, a graphite rod dips into an acidic solution of KClO3 and
KCl; in the other half-cell, a nickel bar dips into a Ni(NO3)2 solution. A KNO3 salt bridge
joins the half-cells, and the graphite is positive relative to the nickel. Diagram the cell,
and write balanced half-cell and cell equations and the cell notation.
6. Balance the following skeleton ionic reaction and calculate E˚cell to decide whether the
reaction is spontaneous:
Cl2 (g) + Fe2+ (aq)  Cl– (aq) + Fe3+ (aq)