Le Chatelier's Principle and Equilibrium

The video tutorial by Mr. Donnie covers Le Chatelier's Principle, focusing on how equilibrium shifts in response to changes in conditions such as temperature, pressure, volume, and concentration. It includes practice problems to illustrate these concepts, discussing scenarios like volume decrease, exothermic reactions, and the role of catalysts. The tutorial emphasizes understanding the direction of equilibrium shifts and the factors influencing them.

What is the primary focus of Le Chatelier's Principle?

• To analyze equilibrium disturbances

• To measure the concentration of reactants

• To determine the speed of chemical reactions

• To calculate the energy released in reactions

Which side will an equilibrium shift to if the volume decreases?

• The side with fewer liquid reactants

• The side with more moles of gas

• The side with more solid reactants

• The side with fewer moles of gas

How does increasing pressure affect a reaction with more moles of gas on the reactant side?

• Shifts equilibrium to the left

• Shifts equilibrium to the right

• No effect on equilibrium

• Increases the concentration of reactants

In an exothermic reaction, how can you increase the number of moles of product?

• By cooling the system

• By increasing the temperature

• By adding more products

• By removing reactants

What is the role of heat in an exothermic reaction according to Le Chatelier's Principle?

• Heat has no role

• Heat is an inhibitor

• Heat is a product

• Heat is a reactant

What happens to an equilibrium with equal moles of gas on both sides when pressure is increased?

• It shifts towards the side with more gas

• It remains unchanged

• It shifts to the right

• It shifts to the left

How can you increase the partial pressure of H2 gas in a reaction?

• By increasing the temperature

• By adding a catalyst

• By removing CO gas

• By adding more H2O gas

What happens to the amounts of products and reactants when the temperature is decreased in an exothermic reaction?

• Both products and reactants decrease

• Products increase, reactants decrease

• Both products and reactants increase

• Products decrease, reactants increase

What is the effect of adding a catalyst to a reaction at equilibrium?

• It speeds up the rate of reaching equilibrium

• It shifts the equilibrium to the right

• It increases the concentration of products

• It decreases the concentration of reactants

Which of the following is true about catalysts in chemical reactions?

• They increase the energy of products

• They increase the energy of reactants

• They lower the activation energy

• They change the equilibrium position