PARTS Category Answer Mark Distribution A Knowledge and Understanding On Page 2 20%, allow 35 minutes B Communication
In Exam
20%, allow 20 minutes C Thinking and Investigation 40%, allow 40 minutes D Application 20%, allow 25 minutes
100%, 120 minutes
Canadian International Matriculation Programme
SCH4U CHEMISTRY FINAL EXAMINATION
Date: Tuesday, June 9, 2015
Time: 11:30 AM – 1:30 PM
Length: 2 Hours
Teachers: Ms. Kimberley Gagnon & Ms. Véronique Turpin
Student Name: Period:
INSTRUCTIONS 1. Circle your teacher’s name above.
2. Check that your examination has 18 typed pages, including the cover page.
3. Answer Part A on the Answer Sheet provided on Page 2 and Parts B, C & D on this exam.
4. You may use a scientific calculator.
5. Chemistry Periodic Table, Standard Reduction Table and Equations are provided separately
on Pages 17 and 18. Tear this last sheet off the exam for easy referral.
6. There are four parts to the exam. Read instructions to each part carefully.
STRUCTURE/EVALUATION
TOTAL
For awesome teacher use only
Part A Performance Level
Part B Performance Level
Part C Performance Level
Part D Performance Level
Overall Performance Level
Percentage
= 4 3 2 1 R 25
4 3 2 1 R
4 3 2 1 R
4 3 2 1 R
4 3 2 1 R
%
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Part A: Circle the Answers to Multiple Choice Questions Here
1. a b c d e
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PART A: Knowledge & Understanding (allow 35 minutes)
Instructions:
Identify the letter of the choice that best completes the statement or answers the questions. Circle the answer on the Answer Sheet on Page 2.
Page 4
−
Part B: Communication: (allow 20 minutes)
Instructions: Answer four (4) of the following 5 questions ONLY. If you attempt all four CIRCLE the questions you want marked otherwise the first four will be marked. Show your thinking and use a combination of words, symbols, diagrams and pictures to express your ideas.
1. Alcohols are generally produced from the fermentation of fruit with yeast or the hydration of an
alkene. Alcohols are widely used as solvents in drugs and perfumes. Some alcoholic compounds are:
Compound Number
Alcohol Name Molecular Formula
1 Propanol CH3CH2CH2OH 2 Methanol CH3OH 3 Butanol CH3CH2CH2CH2OH 4 Ethanol CH3CH2OH
The compounds in order of increasing solubility in water is _, , , and _. Explain how you know.
2. Draw the Lewis Diagram of ���3 �𝑟 �𝐶�3. Make sure to indicate the lone pair of
electrons, specify shape, and whether the molecule is polar.
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3. The following reaction is an example of homogeneous equilibrium
H2(g) + I2(g) 2HI(g)
Explain what happens to the system when a small amount of HI(g) is added to the system?
4. Explain why the following redox reaction does not happen spontaneously.
Au(s) + Mg2+(aq) → Au3+(aq) + Mg(s)
5. Create a simple potential energy diagrams for the following reaction:
S(s) + O2 (g) → SO2 (g) ∆H°r = -296.6 kJ Ea = 100 kJ
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Part C: Thinking/Investigation: (allow 40 minutes)
Instructions: Answer six (6) of the following 7 questions ONLY. If you attempt all six CIRCLE the questions you want marked otherwise the first six will be marked. Write the answer in the space provided. If the question requires mathematical calculations, show all of your work. Answer all questions with the correct units and number of significant figures.
1. Calculate the heat of reaction for the following equation given equations (1), (2), and (3).
4NH3(g) O2(g) 4NO2(g) 6H2O(g)
(1) N2(g) H2(g) NH3(g)
Hf 46.15 kJ
(2) N2(g) O2(g) NO2(g) Hf 33.81 kJ
(3) H2(g) O2(g) H2O(g) Hf 241.6 kJ
2. Complete the following table, based on the following equilibrium system.
2Cl2(g) 2H2O(g) 4HCl(g) O2(g) H 133 kJ
Stress Equilibrium shift
increase in temperature
increase in hydrogen chloride
increase in pressure
removal of oxygen gas
addition of a catalyst
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3. 0.566 mol of NO2(g) is placed in a 1.00 L container. After the following equilibrium is established, the
container is found to contain 0.500 mol of NO. What is the equilibrium constant for this reaction?
2NO2(g) 2NO(g) O2(g)
4. a. Write the ground state electronic configuration for bromine, Br.
b. Draw the energy level diagram for bromine.
c. State the four quantum numbers for the bromines outermost electron.
(_ , _, _,_ )
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5. Draw and label the electrochemical cell (galvanic cell) given the
following:
In your diagram, label:
◦ anode & cathode
Al(s) │ Al3 ║Cu2 │ Cu
(aq) (aq) (s) ◦ choice of electrolytes
◦ direction of electron flow
◦ cations & anions
◦ oxidation and reduction half-cells
Also calculate:
◦ overall cell potential calculation
◦ overall redox reaction for the cell.
6. Complete the following table:
IUPAC Name Structure Name of Compound
3-methylbutan-2-ol
alcohol
N-ethyl-N-isopropylpentanamine
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7. Draw the products produced in the following diagram and then state what type of reaction it is (i.e.
addition).
Part D: Application: (allow 25 minutes)
Instructions: Answer four (4) of the following 5 questions ONLY. If you attempt all five CIRCLE the questions you want marked otherwise the first four will be marked. If the question requires mathematical calculations, show all of your work. Answer all questions with the correct number of significant figures (digits).
1. Vinegar is 5.0% acetic acid (ethanoic acid). If Ka for acetic acid (ethanoic acid) is 1.8 x 10-5, what is the pH of vinegar?
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Tests Conducted Observations Organic Compound
Beaker A -added bromine in water
- yellow solution changed to a colourless solution
Beaker B -added KMnO4
- purple solution changed to a brown precipitate
Beaker C -the mixture was separated and then distilled
- smelled very fruity
Beaker D - lit the compound on fire
- lots of black soot was produced
Beaker E -added K2Cr2O7/acidified
- showed no changes in colour
2. Quicklime, CaO, is widely used in the building and steel industries. In the past, lime was
difficult to transport because of its exothermic reaction with water. Several ships caught on fire when water leaked in and reacted with the lime.
CaO(s) H2O(l) Ca(OH)2(aq) H –65.2 kJ/mol
If 10.0 g of quicklime is added to a 500 mL sample of water, what would the final temperature of the solution be?
Assumptions
◦ all the quicklime dissolved in the water so there is no change in volume of water ◦ no heat was lost to the surroundings ◦ the initial temperature of both the water and the quicklime was 25.0°C
◦ cH2O= 4.19 J/g°C
3. Uh oh! In the lab, Adnan and Wilson have 5 unlabeled beakers on their desk. Each contain different
organic chemicals. What will they do to escape Ms. Turpin and Ms. Kim’s wrath?
Ah ha! They decide to carry out some organic chemistry reactions to determine what is in them. The following tests were conducted and Adnan and Wilson recorded their observations. Help them determine which compound is in each beaker.
Hint! Possible Answers:
◦ butanol
◦ cyclohexene
◦ butylethanoate
◦ methylbenzene
◦ 2-methylpentane-2-ol
?
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4. A galvanic cell was constructed by connecting a nickel electrode into 1.20 M nickel (II) sulphate
solution to a chromium electrode that was dipping into a solution containing Cr3+ ions at an
unknown concentration. The potential of the cell was measured to be 0.552 V, with the chromium
serving as the anode. What was the concentration of Cr3+ ions in the solution of unknown
concentration?
5. Chemistry is all around us and is the very foundation of life as we know it. In the space below, state ONE chemistry related topic from our SCH 4U course and explain the science behind it. Next, briefly mention its implications in technology (or industry) and its impact on society and the environment.
State your topic :
Explain the science :
Technology :
Society :
Environment :