Question

57. In order to answer the following questions, you need to use information from this lesson that you were given in "Determining K, Experimentally and in your answers to the Support Questions. a) Calculate the K, of Ag,Cro, Organize your answer so that your solution is logical. Include all relevant calculations as a part of the complete analysis of the related experiment. Make sure that your K, has the correct number of significant figures. (7 marks) b) Calculate your percentage error, using the following equation. (You first used this equation in Lesson 11.) (2 marks) (experimental - theoretical) % error = theoretical c) Describe two sources of error that could have been present while doing the experiment "Determining K, Experimentally." (2 marks)

Answer 1

Ilution To find ksp of Ag, (204 we know the experimental value of ksp = 1.1 x 10 ml by this we calrulote salubility. I Ag cooy & Ast race) + 603 (a.) let the solubility of Ag Cdo be small Agt 3 = 25; {coo, 2-]-5 Ksp = {Agt? [cao;} = (25) 2/5) = 453 os 45 - kyps ky or 5- (Kun 4 = 65x10" mal 1 of 6.5x18 5 ndit by this value of solubility we find out the theoretical value of solubility product. This means I Ag +)² = (6.5 * logadet Coo,2-165 * 165) mars Ksp (Agt] 2 [220, 2] = (6.5x105) (6.5 x105) 2.74 x 10-13 mdet

Now, to find lage esos we have the x 100 1. Rroos (expedimental – theoretical) theoretical -(1.1x10-12 – 173 x 10-12 x 100 2,7x10-13 .82 x 102 X loo -273 X1642 303% Il There may be two type of edsos while doing. Ksp experimentally and these essos may be due to of varying temp. and pressure. As we increase temp., the solubility of a solid er liquid Can increase of decstare depending on whether the dinolution reaction is exothermic er endo thesmic... Herre inreasing the temperature of the system increases the the selute. solubility of