WS 07 - Key - 2(g 4HI(g 5 Consider the following reaction...

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Name: _____________________________ Quiz Section:_______ CHEM 120A – Autumn 2011 Worksheet #7 1. In the following nuclear reactions, supply the missing particle: a. 205 Bi b 205 Pb + ? b. 192 Pt b 188 Os + ? c. 14 C b 14 N + ? 2. Write the symbols and a balanced nuclear equation for the following: a. When two oxygen-16 atoms collide, one of the products is an alpha particle. b. When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced. 3. Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.1 days. If a patient with thyroid disease consumes a sample of Na 131 I containing 10. μ g of 131 I, how long will it take for the amount of 131 I to decrease to 1/100 of the original amount? 4. For the reaction H 2 (g) + I 2 (g) 2HI(g) K C = 54 at 427 °C. What is the value of K C for the following reactions at 427 °C? a. 2HI(g) H 2 (g) + I 2 (g) b. HI(g) ½ H 2 (g) + ½ I 2 (g) c. 2H 2 (g) + 2I
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Unformatted text preview: 2 (g) 4HI(g) 5. Consider the following reaction: CO(g) + H 2 O(g) H 2 (g) + CO 2 (g) (exothermic) How will the equilibrium position shift in each of the following cases? a. The volume of the container is decreased? b. Water vapor is added. c. The temperature is increased. d. Gaseous carbon dioxide is removed. 6. The K c at 100°C is 2.0 for the reaction 2NOBr(g) 2NO(g) + Br 2 (g) In an experiment, 1.0 mole of NO, 1.0 mole of NOBr and 1.0 mole of Br 2 was placed in a 1.0 L container. a. What is the equilibrium constant expression for the reaction? b. Is the system at equilibrium? c. If not, will the rate of the forward or reverse reaction initially speed up? d. Which concentration(s) will be greater than 1.0 mole/L at equilibrium, and which will be less than 1.0 mole/L? 7. What are [Cu 2+ ] and [CO 3 2-] in a saturated CuCO 3 solution if the K sp of CuCO 3 is 1 x 10-26 ?...
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WS 07 - Key - 2(g 4HI(g 5 Consider the following reaction...

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