Download THE LAST UNIT TEST

SCH 4U
Name _____________________
Some old test questions!!!
Short Answer - 2 marks each or as indicated - 20 MARKS1.
What is the oxidation number of iodine in
2.
In the reaction:
?
identify the reducing agent and the reactant that is reduced.
3.
State whether the change of
ion to
ion is an oxidation or a reduction.
4.
Assign oxidation numbers to each of the atoms in ethanoic acid
5.
What is the oxidation number of Cl in
?
6.
Will a reaction take place if a strip of zinc metal is placed in a solution of lead (II) sulfate?
Justify your answer.
7.
Calculate
(Ecell) for the following equation: (3 marks)
Decide whether the equation represents a spontaneous or a nonspontaneous reaction at standard
conditions.
8.
Define corrosion. Include the equation for the reaction. 3 marks
Problem - 4 marks each - 16 total
9.
When sodium sulfite solution is added to acidified potassium permanganate solution, the purple
permanganate solution turns colourless.
:
Balance the equation of the overall redox reaction (in acidic medium).
10.
Balance the following redox reaction which takes place in a basic solution
11.
A bossy student tells you that you should never store a 1 mol/L HNO3 solution in a lead
container. Is he correct? Explain your answer (4 marks)
12.
Draw an electrochemical cell for the following system:
C/Ag+ // Mg2+/Mg
In your answer, clearly label: cathode, anode, direction of electron flow, and write the overall equation
with Ecell.
SCH 4U
Name _____________________