Lecture Seventeen - Equilibria Flashcards
What is Le Chatelier’s Principle regarding change in V/P?
If volume of a gas reaction is decreased, the concentrations increase and Q changes.
Reaction tends to the side that has fewer molecules.
If volume of a gas reaction is increased, concentrations decrease.
Reaction tends towards the side that has more as molecules.
Addition of an inert gas will not change the equilibrium.
What is Le Chatelier’s Principle with regards to changes in temperature?
Raising temperature of an exothermic reaction favours the formation of reactants.
Raising the temperature of an endothermic reaction favours the formation of products.
Do catalysts change the position of equilibrium?
No, they just change the rate at which equilibrium is reached.
Explain sparingly soluble salts in equilibrium reactions.
In a saturated solution, an equilibrium exists between the undissolved solid and its dissolved form.
The solubility of a solid is the larges amount which will dissolve in a given volume of solvent.
Solubility is highly temperature dependant.
To find the solubility product Ksp, the solubility values of each molecule of the reaction can be put in a formula of the same for as all K equations.
If a system is not at equilibrium, the notation Qsp will be used.
If QspKsp, solution is supersaturated, no at equilibrium, then solute precipitation will occur until equilibrium is re-established.
