Understanding Reaction Quotients and Equilibrium

Mr. Anderson explains the concepts of the reaction quotient (Q) and equilibrium constant (K) in reversible reactions. He uses models and graphs to illustrate how Q and K are calculated and how they relate to each other. The video also covers how to use ICE tables to determine Q and K values and predict the direction of a reaction based on these values.

What is the purpose of the reaction quotient (Q) in a chemical reaction?

• To compare the current state to equilibrium

• To calculate the energy released

• To measure the speed of the reaction

• To determine the final state of the reaction

In a reversible reaction, what does the equilibrium constant (K) represent?

• The energy required to start the reaction

• The speed of the reaction

• The ratio of products to reactants at equilibrium

• The initial concentration of reactants

How is the reaction quotient (Q) calculated?

• By adding the concentration of products and reactants

• By dividing the concentration of reactants by products

• By multiplying the concentration of products and reactants

• By dividing the concentration of products by reactants

What happens to the value of Q as a reaction approaches equilibrium?

• Q remains constant

• Q becomes less than K

• Q becomes greater than K

• Q approaches K

If Q is less than K, in which direction will the reaction proceed?

• It will oscillate between reactants and products

• To the left, forming more reactants

• It will remain unchanged

• To the right, forming more products

What does it mean when Q equals K in a chemical reaction?

• The reaction is at its fastest rate

• The reaction is just starting

• The reaction is at equilibrium

• The reaction is irreversible

What is the purpose of an ICE table in chemical reactions?

• To measure the temperature change

• To calculate the energy of the reaction

• To determine the speed of the reaction

• To track initial, change, and equilibrium concentrations

Why is stoichiometry important in calculating Q and K?

• It ensures the correct ratio of reactants and products

• It predicts the color change in reactions

• It determines the speed of the reaction

• It measures the energy change

What does the 'C' in ICE table stand for?

• Concentration

• Change

• Catalyst

• Constant

In the context of reaction quotients, what does a homogeneous state refer to?

• A state with only solids

• A state with varying phases

• A state with only gases

• A state with uniform composition