chem exams answers - DAWSON DAWSON COLLEGE DEPARTMENT OF CHEMISTRY AND CHEMICAL TECHNOLOGY CHEMISTRY 202 NYA 05 FINAL EXAMINATION WINTER 2006 TIME

chem exams answers - DAWSON DAWSON COLLEGE DEPARTMENT OF...

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DAWSON COLLEGE DAWSON COLLEGE DEPARTMENT OF CHEMISTRY DEPARTMENT OF CHEMISTRY DEPARTMENT OF CHEMISTRY AND CHEMICAL TECHNOLOGY AND CHEMICAL TECHNOLOGY AND CHEMICAL TECHNOLOGY CHEMISTRY 202 NYA 05 CHEMISTRY 202 NYA 05 FINAL EXAMINATION FINAL EXAMINATION WINTER 2006 WINTER 2006 WINTER 2006 TIME ALLOWED 3 HR. Name & ID: ------------------------------------------------------------------ Course: ------------------------------------------------------------------ Section: ------------------------------------------------------------------ Date: ------------------------------------------------------------------ INSTRUCTIONS 1. WRITE IN INK 2. ANSWER ALL 17 QUESTIONS (THERE ARE 23 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. A correct 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 -31 kg 9. Planck s Constant = 6.626 x 10 -34 J.s Gas constant R = 0.0821 L.atm/K.mol = 8.3143 kPa.dm 3 /K.mol Speed of light = 2.9979 x 10 8 m/s Avogadro s constant, Na = 6.02 x 10 23 particles/mole Bohr Constant = 2.178 x 10 -18 J Rydberg Constant, R H = 1.097 x 10 7 m -1 OR 1.097 x 10 -2 nm -1 1 J = 1 kg. m 2 /s 2 Standard Pressure = 1.000 atm. = 760.0 mm Hg = 760.0 torr = 101.325 kPa Q.1 5 / Q.7 5 / Q.13 7 / Q.2 6 / Q.8 6 / Q.14 3 / Q.3 4 / Q.9 5/ Q.15 5 / Q.4 7 / Q.10 12 / Q.16 6/ Q.5 8 / Q.11 7 / Q. 17 3/ Q.6 4 / Q.12 6 / Sig. Figs 1 / TOTAL 34/ TOTAL 41/ TOTAL 25 / TOTAL 100 /
2 Q.1. Give the names of the compounds whose formulas are given below: [5 Marks] i) Calcium phosphate; .. Ca 3 (PO 4 ) 2 ii) Hydrobromic acid: HBr (aq) iii) Iron (III) hydroxide: .. ... Fe(OH) 3 iv) Nitrous acid: .. HNO 2 v) Ammonium acetate: .. NH 4 C 2 H 3 O 2 Write formulas for the compounds whose names are given below: i) NaHSO 4 : .. Sodium bisulphate ii) P 4 S 3 : . Tetraphosphorus trisulfide iii) Hg 2 Cl 2 : Mercury(I) chloride iv) HClO 4 : . Perchloric acid v) H 2 S (aq): ... Hydrosulfuric acid
3Q.2. a) One of the solids present in photographic film is silver bromide (AgBr). This compound is quite insoluble in water. One way to prepare it is to mix solutions of silver nitrate and calcium bromide. The equation for this reaction is given as: 2AgNO3(aq) + CaBr2(aq) =2AgBr (s) + Ca(NO3)2How many milliliters of 0.125 M CaBr2solution must be used to react with 50.0 mL of 0.115 M AgNO3?[3 Marks] (aq) 3 2 2
4b) In one of your recent experiments you determined the amount of iodine in solution by titrating with sodium thiosulfate. Sodium nitrite, NaNO 2H 2 O (l)

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