Chem 3 Flashcards
(14 cards)
What is the rate of reaction?
The rate of reaction is the change in concentration of reactants or products per unit time.
True or False: The rate of reaction can only be expressed in terms of reactants.
False
Fill in the blank: The rate of reaction generally increases with an increase in _______.
temperature
What is equilibrium in a chemical reaction?
Equilibrium is the state in which the concentrations of reactants and products remain constant over time.
Multiple Choice: Which factor does NOT affect the rate of reaction? A) Concentration B) Surface Area C) Color D) Temperature
C) Color
What is the effect of a catalyst on the rate of reaction?
A catalyst increases the rate of reaction by lowering the activation energy.
True or False: At equilibrium, the forward and reverse reactions occur at different rates.
False
Fill in the blank: The law that states that the rate of a reaction is proportional to the product of the concentrations of the reactants raised to their respective powers is known as _______.
the rate law
What is dynamic equilibrium?
Dynamic equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction.
Multiple Choice: Which of the following changes will shift the equilibrium to the right? A) Increase in reactants B) Decrease in temperature C) Increase in products D) Increase in pressure (for gases)
A) Increase in reactants
What is the significance of the equilibrium constant (K)?
The equilibrium constant (K) quantifies the ratio of the concentrations of products to reactants at equilibrium.
True or False: A reaction at equilibrium can be disturbed by changing the concentration of reactants or products.
True
Fill in the blank: The principle that states that if an external change is applied to a system at equilibrium, the system adjusts to counteract that change is known as _______.
Le Chatelier’s principle
What happens to the rate of reaction when the concentration of reactants increases?
The rate of reaction generally increases.
