HW:
(1) Complete the BONUS question from the Chemical Equilibrium Quiz (due Monday); and
(2) Complete a write-up (minimum of two-pages including drawings) regarding the following (due Tuesday):
- What is a reversible reaction? What does it mean for a reaction to reach equilibrium? How is the reaction rate related to concentration?
- Phosgene is the chemical compound with the formula COCl2. This colorless gas gained infamy as a chemical weapon during World War I. It is also a valued industrial reagent and building block in synthesis of pharmaceuticals and other organic compounds.Consider the following endothermic reaction:
COCl2 <---> CO(g) + Cl2(g) Keq = 170
Write the formula for the equlibrium constant for this reaction. If the concentrations of CO and Cl2 are each 0.15M and the concentration of COCl2 is 1.1 x 10^-3M, has the reaction reached equilibrium? How do you know? If not, in which direction will the reaction proceed? - What is Le Chatelier's Principle?
- For the above reaction, explain how the following changes would shift the equilibrium position of the reaction:
- Increasing and decreasing pressure - explain in text and draw particle diagrams
- Increasing and decreasing reactant concentrations - explain in text and draw partile diagrams
- Increasing and decreasing temperature - explain in text
- Explain the processes of dissolution and precipitation. What does it mean for a solution to be unsaturated vs. saturated? What does it mean for a solid to reach solubility equilibrium?
- Consider the following chemical equation:
Fe(OH)3 (s) <---> Fe3+(aq) + 3 OH-(aq) Ksp = 6.3 x 10^-38
Write the formula for the equlibrium constant for this reaction. - For the above reaction, explain how the following changes would shift the equilibrium position of the reaction:
- Increasing and decreasing reactant concentrations - explain in text
- Increasing and decreasing temperature - explain in text
- Adding HCl to the solution - explain in text
- Adding NaOH to the solution - explain in text
