Chemistry: Kinetics & Chemical Equilibrium Flashcards
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For the dissolution equilibrium AgCl(s) ⇌ Ag+(aq) + Cl-(aq), the Ksp expression is
Answer: [Ag+][Cl-]
Pure solids are omitted, so Ksp = [Ag+][Cl-].
Adding Cl- ions to a saturated solution of AgCl will
Answer: decrease AgCl solubility
The common-ion effect shifts equilibrium toward solid AgCl, lowering its solubility.
A reaction reaches equilibrium when
Answer: the forward and reverse reaction rates are equal
At equilibrium the forward and reverse rates are equal, keeping concentrations constant.
For the reaction 2SO2 + O2 ⇌ 2SO3, removing SO3 as it forms will
Answer: shift equilibrium toward products
Removing a product shifts equilibrium forward to replace it.
Which factor increases reaction rate by increasing collision frequency without raising average energy?
Answer: Increasing concentration of reactants
Higher concentration increases the number of collisions per unit time.
The reaction quotient Q has the same form as K but uses
Answer: concentrations at any moment
Q uses current concentrations at any point, while K uses equilibrium values.
Increasing the surface area of a solid reactant generally
Answer: increases the reaction rate
Greater surface area exposes more particles to collisions, increasing the rate.