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SCH 3U1 FINAL
Mrs. D. Ridge
Mr. D. Lougheed
Time 2.0h
Date:
NAME:__________________________________________________________________________
PERIOD: _________________
PART A - ANSWER GRID
Other than a calculator and the tables provided with this examination booklet, no other aids are permitted.
Please indicate your answer by marking an “X” through the letter of your choice.
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SCH 3U1 FINAL
Mr. D. Lougheed
Mrs. D. Ridge
Time
Date
2.0h
Other than a calculator and the tables provided with this examination booklet, no other aids are
permitted. Please remember to transfer your answers to the answer sheet provided.
Allow approximately 30 minutes for this section.
PART B - Multiple Choice Questions [30 marks]
1) Suppose that three isotopes of element X occur in nature as follows:
RELATIVE
ISOTOPE
ATOMIC MASS
%
----------------------------------1
110.0
60.0
2
105.0
30.0
3
100.0
10.0
The relative atomic mass of the naturally occurring mixture of element X is
(a) 102.5
(b) 105.0
(c) 107.5
(d) 315.0
2) Which element has the electron configuration 1s22s22p 63s2?
(a) aluminum
(b) calcium
(c) magnesium
(d) sodium
3) Of the elements sodium, potassium, rhubidium and cesium, which is the least metallic?
(a) sodium
(b) potassium
(c) rhubidium
(d) cesium
4) Atoms of element X, having two valence electrons, combine with atoms of the element Y, having seven
valence electrons. Which of the following statements is true?
(a) X 2 - ions are formed
(b) Y 2 - ions are formed
(c) the compound formed has the formula X2 Y
(d) the compound formed has the formula XY2
5) Which type of force acts between molecules of oxygen
(a) ionic bond
(b) double covalent bonds
(d) hydrogen bonds
(e) London forces
6) When the equation
H3 PO4 + BaCO3 Æ
Ba3 (PO4 )2 + H2 O +
is balanced, the coefficient of the carbon dioxide is
(a) 1
(b) 2
(c) 3
(d) 4
(c) dipole-dipole
CO2
7) A strip of metal was immersed in a solution of aluminum sulphate. No apparent reaction was observed. It
was then immersed in a solution of tin (II) nitrate and became coated with tin. The metal is
(a) less active than tin but more active than aluminum
(b) a weaker reducing agent than tin only
(c) a stronger reducing agent than aluminum only
(d) less active than aluminum but more active than tin
8) If magnesium chloride is mixed with barium nitrate solution, what will precipitate?
(a) magnesium nitrate
(b) magnesium chloride
(c) barium chloride
(d) barium nitrate
(e) nothing
9) When a chemical reaction takes place, which of the following are conserved?
1 - number of atoms
2 - number of molecules
3 - number of moles
4 - mass
5 - volume
(a) 1, 3
(b) 2, 4
(c) 3, 5
(d) 1, 4
(e) 2, 5
10) The number of moles of CO2 in 0.66 g of the gas is
(a) 0.015
(b) 0.
(c) 0.44
(d) 2.2
11) Determine the number of oxygen atoms in one mole of Al2 (SO4 )3 .
(a) 3
(b) 12
(c) 3 x 6.02 x 1023
23
23
(d) 4 x 6.02 x 10
(e) 12 x 6.02 x 10
12) The simplest formula of an unknown compound is found to be CH2 N2 . The molar mass of the compound
is determined to be 126 g. The molecular formula must then be
(a) C3 H6 N6
(b) C3 H8 N6
(c) CH2 N2
(d) C2 H4 N4
Page 4 of 6
13) How many moles of carbon dioxide can be produced from the burning of 3 moles of butane, C4 H10(g)?
2 C4 H10(g)
(a) 8
+ 13 O2 (g)
Æ 8 CO2(g)
(b) 12
+ 10 H2 O(g)
(c) 16
(d) 24
14) Rubbing alcohol is commonly used as an antiseptic for small cuts. It is sold as a 70% (v/v) solution of
isopropyl alcohol in water. What volume of isopropyl alcohol is used to make 500 mL of rubbing alcohol?
(a) 14 mL
(b) 350 mL
(c) 3.5 x 102 mL
(d) 7.14 mL (e) 7.1 mL
15) A precipitate forms when aqueous solutions of magnesium chloride and sodium fluoride are mixed. The net
ionic equation is
(a) MgCl2 (aq) + 2 NaF(aq) Æ 2 NaCl (aq) + MgF2(aq)
2+
-1
+
-1
+
-1
(b) Mg(aq) + 2 Cl(aq) + 2 Na(aq) + 2 F (aq) Æ 2Na(aq) + 2 Cl(aq) + MgF(s)
+
-1
(c) 2 Na(aq) + 2 Cl(aq) Æ 2 NaCl(aq)
2+
-1
(d) Mg(aq) + 2 F(aq) Æ MgF2(s)
16) For which of the following can the metal ions be separated by adding a solution of hydrochloric acid
(HCl(aq))?
(a) sodium nitrate and mercury(I) nitrate (b) calcium nitrate and strontium nitrate
(c) silver nitrate and mercury(I) nitrate
(d) iron(II) nitrate and aluminum nitrate
17) Which of the following could be used to determine whether or not an acid is strong or weak?
(a) effect on litmus paper
(b) measurement of solubility
(c) determination of concentration
(d) measurement of electrical conductivity
18) According to the Brønsted–Lowry concept of acid–base reactions, the acids in the equation
H2O
+
are:
(a) H2O and OH–
(d) CO32– and HCO3–
CO32– Æ
HCO3–
+
OH–
(b) HCO3– and OH–
(e) H2O and CO32–
(c) H2O and HCO3–
19) What is the concentration of H3 O+ in a solution whose pH is 4?
(a) 104 M
(b) 10-4 M
(c) 10-10 M
(d) 4 M
20) The random motion of molecules helps to explain
(a) the compressibility of gases
(b) the fact that gases fill their container
(c) the low density of gases
(d) the transparency of gases
21) Doubling the initial pressure, at constant temperature, under which 1000 mL of a gas was confined causes
the volume of the gas to
(a) increase to double
(b) remain the same
(c) decrease very slightly
(d) decrease to half
22) Other factors being constant, the volume of an ideal gas is NOT affected by changes in the
(a) number of molecules present
(b) molar mass of the gas
(c) temperature
(d) pressure
23) Three moles of H2 , measured at STP, occupy
(a) 11.2 L
(b) 22.4 L
(c) 44.8 L
(d) 67.2 L
24) Four gases are mixed together in the same container. Their partial pressures are
gas A - 65 kPa
gas B - 40 kPa
gas C - 160 kPa
gas D - 80 kPa
Select the correct completion. The number of molecules of gas D
(a) is less than the number of molecules of gas A
(b) is double the number of molecules of gas C
(c) is half the number of molecules of gas B
(d) is half the number of molecules of Gas C
25) Which statement is true?
(a) In general, as we ascend a homologous series, we observe an decrease in boiling points.
(b) In the alkane series, branched-chain isomers have higher boiling points than their straight-chain
isomers.
(c) A hydrocarbon that does contains a double bond, a triple bond, or a benzene ring is said to be saturated.
(d) The general formula of a straight-chain alkane is Cn H2n
(e) Cyclic alkanes contain fewer hydrogen atoms than straight-chain alkanes that have the same number of
carbon atoms.
Page 5 of 6
26) The formula of an unsaturated hydrocarbon is
(a) CH4
(b) C2H2
(c) C2H6
(d) C3H8
(e) C4H10
27) Consider the substance with this formula
H H H
H C C C Cl
H H H
Which is an isomer of this substance?
H H H
H H H
(a) H C C C Cl
(b) H C C C Br
H H Cl
H H H
H H H
H H H H
(c) H C C C H
(d) H C C C C Cl
H Cl H
H H H H
28) Substances with high specific heat capacities
(a) have molecules which are insulators
(b) have molecules which are good conductors
(c) have weaker inter-particle forces of attraction than those of substances with lower specific heat
capacities
(d) have stronger inter-particle forces of attraction than those of substances with lower specific heat
capacities
29) It takes 256 kJ of heat energy to raise the temperature of a 0.80 kg potato from 20°C to 100°C. What is
the specific heat capacity of the potato?
(a) 2.6 kJ/(kg·°C )
(b) 32. kJ/(kg·°C )
(c) 4.0 kJ/(kg·°C )
(d) 16 kJ/(kg·°C )
30) What is the heat of reaction, DH, for the reaction A Æ B?
(a) 0 kJ⋅mol– 1
(b) –20 kJ⋅mol– 1
(c) –40 kJ⋅mol– 1
PART C - Written Questions
(d) –80 kJ⋅mol– 1
[63 marks]
Other than a calculator and the tables provided with this examination booklet, no other aids are permitted.
The quality of your writing is part of this evaluation.
Explanations generally require logically organized sentences.
Numerical answers must be reported with the correct number of significant figures.
Please answer the following questions on the foolscap provided.
Allow approximately 90 minutes for this section.
31) Give IUPAC name for each of the following. [4 marks]
Ba3 N2
SnI4
N2 O
Fe(H2 PO4 )3
32) Give the formulae for the following. [5 marks]
cupric phosphide
potassium bromide
ammonium sulphide
tin (II) nitrate
manganese(IV) oxide
31
33) Give a Bohr diagram for 15 P. [3 marks]
34) Give the number and type of fundamental particles found in the calcium ion, Ca2+. [3 marks]
Page 6 of 6
35) Give electron dot diagrams for each of the following. [4 marks]
(a) HF
(b) AlCI3
(c) NBr3
(d) CO2
36) Write a balanced equation for the following. When calcium oxide is added to water, calcium hydroxide is
formed. The temperature of the water increases during the reaction. [2 marks]
37) Classify each of the following as combination, decomposition, single displacement or double displacement
reactions. [4 marks]
(a) KOH(aq) + HNO3(aq) Æ KNO3(aq) + H2 O(l)
(b) Ni(s) + CuSO4(aq) Æ NiSO4(aq) + Cu(s)
(c) 2 NaNO3(s) Æ 2 NaNO2(s) + O2(g)
(d) 2 Zn(s) + O2(g) Æ 2 ZnO(s)
38) Explain how the ionization energy of fluorine as compared to oxygen is related to their relative atomic
sizes. [3 marks]
39) Bonds may be covalent, polar covalent or ionic. Discuss the relationship between the electronegativities
of the elements and the progression in bond character for F2 , CF4 and NaF. [3 marks]
40) How many moles of Ba ions are found in 107.5 g of Ba(ClO3 )2 ? [2 marks]
41) Calculate the simplest formula for a compound found to be 26.57 %K, 35.36 % Cr and 38.07 % O.
[3 marks]
42) A clear solution is made from 1.5 L of 0.40 M MgCl2 and 0.50 L of water. Calculate the resultant
concentration of chloride ion. [3 marks]
43) In acid solution, lead(II) nitrate will react quantitatively with potassium chromate to produce a precipitate
of lead(II) chromate.
Pb(NO3 )2(aq)
+ K2 CrO4(aq)
Æ PbCrO4(aq)
+ 2 KNO3(aq)
Supposing that 0.500 mL of 0.300 M potassium chromate is added to 30.0 mL of 0.0105 M lead(II)
nitrate, determine the limiting reagent [5 marks]
44) What volume of 0.2000 M phosphoric acid is needed to neutralize 5.25 g of barium hydroxide. [4 marks]
3 Ba(OH)2(s)
+ 2 H3 PO 4(aq)
Æ Ba3 (PO4 )2(aq)
+ 6 H2 O(l)
45) A gas, collected over water at 25°C, occupies 10.5 L. The total pressure of the collected gas is 98.5 kPa.
If the gas is dried and placed in a 12.0 L flask at 30°C, what will the pressure of the gas be? (NB vapor
pressure of water at 25°C is 3.17 kPa) [3 marks]
46) Which would liberate more hydrogen at STP when reacted with hydrochloric acid - 30 g of zinc or 30 g of
magnesium? How much more? [6 marks]
47) (a) Give line drawings and correct IUPAC names for three isomers of C5 H1 2. [3 marks]
(b) The C5 H1 2 isomers have boiling pts of 9.5°C , 36.1°C, 27.8°C. Explain which boiling point goes with
which structure and give your reasoning. [3 marks]