AUP CHM 151 Assignment 5 - 4(a In the titration of 25.0 mL...

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CHM 151 (General Chemistry) Assignment 5 (Due date: 22-10-2008) Name: ID: 1. The reaction, CO (g) + H 2 O (g) CO 2 (g) + H 2 (g) Has K c = 4.06 at 500 o C. If 0.100 mol of CO and 0.100 mol of H 2 O are placed in a 1.00 liter reaction vessel at this temperature, what are the concentrations of the reactants and products when the system reaches equilibrium?
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2. Using Le Chateliar’s principle, explain the shift (if any) that would occur to the following reaction: C 2 H 6 (g) C 2 H 4 (g) + H 2 (g) H = + ve (a) if the concentration of hydrogen gas is decreased (b) if the temperature is lowered (c) if catalyst is added (d) if C 2 H 6 is removed from the system (e) if the volume of the container is increased if the temperature is raised. 3. (a) Calculate the percentage of ionization for 0.60 M hydroflouric acid solution? (K a HF = 7.1 x 10 -4 ) (b) What is the pH of a 0.40 M ammonia solution? (K b NH 3 = 1.8 x 10 -5 )
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4. (a)
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Unformatted text preview: 4. (a) In the titration of 25.0 mL of 0.100 M HCl with ammonia, calculate the pH after adding 25.0 mL of 0.100 M NH 3. (K b NH 3 = 1.8 x 10-5 ) (b) In the titration of 25.0 mL of 0.100 M acetic acid with sodium hydroxide, calculate the pH after the addition of: (K a = 1.8x10-5 ) (K a = 1.8x10-5 ) 5. It was found experimentally that the solubility of calcium sulphate is 0.67 g/L. Calculate the K sp for calcium sulphate. 6. (a) Based on the cell notation below; Ag(s) | Ag + (aq) || M 3+ (aq) | M(s) E° = 1.00 V (i) Write the balanced equation for the spontaneous reaction in the cell. (ii) Calculate E° M3+│M [ E° Ag | Ag + = 0.80 V ] (b) Consider the electrolysis of molten barium chloride, BaCl 2 . (i) Write the half-reaction. (ii) How many grams of barium metal can be produced by supplying 0.50 A for 30 min?...
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