# 2007 w a.pdf

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Published on 11 Oct 2012
School
McGill University
Department
Mathematics & Statistics (Sci)
Course
MATH 222
DAWSON COLLEGE
DAWSON COLLEGEDAWSON COLLEGE
DAWSON COLLEGE
DEPARTMENT OF CHEMISTRY
DEPARTMENT OF CHEMISTRYDEPARTMENT OF CHEMISTRY
DEPARTMENT OF CHEMISTRY
AND CHEMICAL TECHNOLOGY
AND CHEMICAL TECHNOLOGYAND CHEMICAL TECHNOLOGY
AND CHEMICAL TECHNOLOGY
CHEMISTRY 202 NYA 05
CHEMISTRY 202 NYA 05CHEMISTRY 202 NYA 05
CHEMISTRY 202 NYA 05
FINAL EXAMINATION
FINAL EXAMINATIONFINAL EXAMINATION
FINAL EXAMINATION
WINTER 2007
WINTER 2007WINTER 2007
WINTER 2007
May 22, 2007 TIME ALLOWED 3 HR.
Circle The Name of Your Instructors From The List Below
T. BUI A. MUNERA R. SQUIRE
INSTRUCTIONS
1. WRITE IN INK
2. ANSWER ALL 15 QUESTIONS (THERE ARE 19 PAGES)
3. Electronic calculators (Non-Programmable) are allowed but must not be passed around
4. Answer each problem within the space provided
5. Show complete work (where it is required in order to get full credit)
6. Acorrect answer with no work shown will carry a zero mark
7. Messy work and messy answer will not be marked
8. Mass of electron = 9.1095 x 10-31kg
9. Planck’s Constant = 6.626 x 10-34J.s
Gas constant R = 0.0821 L.atm/K.mol
= 8.3143 kPa.dm3/K.mol
Speed of light = 2.9979 x 10 8m/s
Avogadro’s constant, Na = 6.02 x10 23 particles/mole
Bohr Constant = - 2.178 x 10 -18 J
Rydberg Constant, RH=1.097 x 107m-1 OR 1.097 x 10 -2 nm -1
1 J = 1 kg. m2/s2
Standard Pressure = 1.000 atm. = 760.0 mm Hg = 760.0 torr = 101.325 kPa
Q.1 /10 Q.7 / 3 Q.13 / 3
Q.2 / 7 Q8 /7 Q.14 /6
Q.3 /6 Q.9 /6 Q.15 / 6
Q.4 / 8 Q.10 / 4
Q.5 / 8 Q.11 / 7 Sig. Figs _ /1_
Q.6 / 12 Q.12 /6 TOTAL /16
TOTAL 51/TOTAL 33/TOTAL / 100
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Q.1. Name each of the following compounds: [5 Marks]
a. CuI2:_______ Copper (II) Iodide ____________
b. K2CO3:______Potassium Carbonate _________
c. (NH4)3PO4:___Ammonium Phosphate _______
d. HBrO3(aq):___ Bromic Acid ________________
e. Fe2(SO3)3:____ Iron (III) Sulfite _____________
Write formulas for each of the following compounds: [5 Marks]
a. Ammonium Sulfide: ______(NH4)2S___________
b. Carbon tetrafluoride: ______ CF5______________
c. Lithium dihydrogen Phosphate: _LiH2PO4_______
d. Nitrous Acid: ____________ HNO2____________
e. Lead (II) Hydroxide: ______ Pb(OH)2__________
Q.2 a) What volume of 0.0200M calcium hydroxide is required to neutralize 35.00 mL of
0.0500 M nitric acid? [2 Marks]
Ca(OH)2+2HNO3
Ca(NO3)2+2H2O
0.035 L HNO3*0.05 mol HNO3/ L HNO3* 1 mol Ca(OH)2/ 2 mol HNO3
*1L Ca(OH)2/0.02 mol Ca(OH)2=43.75 mL Ca(OH)2
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b) The reaction of aqueous silver nitrate and aqueous calcium chloride leads to the formation of a
solid compound.
i) Write a complete balanced chemical equation for this reaction. Make sure you indicate all the
physical states of the substances in the equation. [2 Marks]
2AgNO3(aq) + CaCl2(aq)
2AgCl(s) + Ca(NO3)2(aq)
ii) How many grams of solid can be prepared by the reaction of 100.0 mL of 0.200 M
silver nitrate with 100.0 mL of 0.150M calcium chloride? Which reagent is limiting and which is
in excess? [3 Marks]
2AgNO3(aq) + CaCl2(aq)
2AgCl(s) + Ca(NO3)(aq)
0.100 L AgNO3*0.2mol AgNO3/L AgNO3=0.02 mol AgNO3
0.100 L CaCl2*0.15mol CaCl2/L CaCl2=0.015 mol CaCl2
0.015 mol CaCl2*2mol AgNO3/1 mol CaCl2=0.03 mol AgNO3
AgNO3is LR
CaCl2 is in excess
0.02 mol AgNO3*2mol AgCl / 2 mol AgNO3=0.02 mol AgCl * 143.45g AgCl / 1 mol AgCl
>2.87 g AgCl(s)
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## Document Summary

Circle the name of your instructors from the list below: bui a. munera, squire. Speed of light = 2. 9979 x 10 8 m/s. Avogadro"s constant, na = 6. 02 x10 23 particles/mole. Bohr constant = - 2. 178 x 10 -18 j. Rydberg constant, rh = 1. 097 x 107 m -1 or 1. 097 x 10 -2 nm -1. = 760. 0 mm hg = 760. 0 torr = 101. 325 kpa. Name each of the following compounds: cui2: _______ copper (ii) iodide ___________, k2co3: ______potassium carbonate ________, (nh4)3po4: ___ammonium phosphate ______, hbro3 (aq): ___ bromic acid _______________, fe2(so3)3: ____ iron (iii) sulfite _____________ Write formulas for each of the following compounds: ammonium sulfide: ______(nh4)2s __________, carbon tetrafluoride: ______ cf5_____________, lithium dihydrogen phosphate: _lih2po4______, nitrous acid: ____________ hno2___________, lead (ii) hydroxide: ______ pb(oh)2__________ Q. 2 a) what volume of 0. 0200m calcium hydroxide is required to neutralize 35. 00 ml of. 0. 035 l hno3 * 0. 05 mol hno3 / l hno3 * 1 mol ca(oh)2 / 2 mol hno3.