Le Chatelier's Principle and Reaction Dynamics

Mr. Lim introduces key vocabulary related to chemical equilibrium, including shifts, favors, net reactions, yield, and Le Chatelier's Principle. The video explains how shifts and favors indicate which reaction is faster, the concept of net reaction, and the difference between yield and concentration. Le Chatelier's Principle is discussed as a tool to predict system responses to changes, though Mr. Lim advises against relying solely on it.

What does it mean when a reaction 'shifts to the left'?

• The reverse reaction is faster.

• The forward reaction is faster.

• The reaction has stopped.

• The reaction is at equilibrium.

In the context of equilibrium, what do the terms 'shifts' and 'favors' indicate?

• The speed of the reaction.

• The temperature of the reaction.

• The direction and rate of the reaction.

• The concentration of reactants.

What is a net reaction?

• The sum of all reactants and products.

• The overall reaction considering both forward and reverse rates.

• The reaction that produces the most products.

• The reaction that occurs at the fastest rate.

Why is it important to state which reaction rate is faster?

• To determine the temperature of the system.

• To understand the overall direction of the reaction.

• To calculate the concentration of products.

• To predict the color change in the reaction.

How does a change in volume affect yield and concentration?

• It has no effect on either yield or concentration.

• It affects both yield and concentration.

• It changes the concentration but not the yield.

• It changes the yield but not the concentration.

What happens to the concentration of reactants when the container size decreases?

• It remains the same.

• It decreases.

• It fluctuates randomly.

• It increases.

What is Le Chatelier's Principle used for?

• Determining the temperature of a system.

• Calculating the speed of a reaction.

• Predicting how a system will respond to changes.

• Predicting the color of a reaction.

According to Le Chatelier's Principle, what happens if the temperature of a system is increased?

• The system will remain unchanged.

• The system will stop reacting.

• The system will favor the endothermic reaction.

• The system will favor the exothermic reaction.

Why is Le Chatelier's Principle considered a simplistic approach?

• It only applies to gaseous reactions.

• It doesn't explain why changes occur.

• It requires complex calculations.

• It doesn't account for changes in pressure.

What is the preferred method over Le Chatelier's Principle for explaining changes in a system?

• Measuring temperature changes.

• Applying collision theory.

• Calculating pressure differences.

• Using colorimetric analysis.