Chemical Equilibrium

What is chemical equilibrium?

• A state where the rate of forward reaction is greater than the rate of backward reaction
• A state where the rate of backward reaction is greater than the rate of forward reaction
• A state where there is no reaction occurring
• A state where the rate of forward reaction equals the rate of backward reaction

What is the equilibrium constant? (The term product may refer to multiplication or compounds within the balanced equation.)

• The ratio of the product of the concentrations of the products to the product of the concentrations of the reactants in a chemical reaction at equilibrium
• The ratio of the sum of the concentrations of the products to the sum of the concentrations of the reactants in a chemical reaction at equilibrium
• The ratio of the sum of the concentrations of the reactants to the sum of the concentrations of the products in a chemical reaction at equilibrium
• The ratio of the product of the concentrations of the reactants to the product of the concentrations of the products in a chemical reaction at equilibrium

What is Le Chatelier's principle?

• If a change is imposed on a system at equilibrium, the position of the equilibrium will shift in a way that tends to reinforce the imposed change
• If a change is imposed on a system at equilibrium, the position of the equilibrium will shift in a way that tends to counteract the imposed change
• If a change is imposed on a system at equilibrium, the position of the equilibrium will remain unchanged
• If a change is imposed on a system at equilibrium, the position of the equilibrium will shift in a random way

What is the effect of increasing the concentration of reactants on the position of equilibrium?

• The equilibrium position shifts towards the reactants
• The equilibrium position is unpredictable
• The equilibrium position shifts towards the products
• The equilibrium position remains unchanged

What is the effect of decreasing the temperature on the position of equilibrium?

• The equilibrium position remains unchanged
• The equilibrium position shifts towards the endothermic direction
• The equilibrium position is unpredictable
• The equilibrium position shifts towards the exothermic direction

What is the effect of adding an inert gas to a gaseous reaction mixture at constant volume?

• The equilibrium position is unpredictable
• The equilibrium position remains unchanged
• The equilibrium position shifts towards the side with more moles of gas
• The equilibrium position shifts towards the side with fewer moles of gas

What is the effect of adding a catalyst on the position of equilibrium? 🥽

• The equilibrium position remains unchanged
• The equilibrium position is unpredictable
• The equilibrium position shifts towards the reactants
• The equilibrium position shifts towards the products

What is the effect of increasing the pressure on the position of equilibrium for a gaseous reaction?

• The equilibrium position shifts towards the side with fewer moles of gas
• The equilibrium position remains unchanged
• The equilibrium position shifts towards the side with more moles of gas
• The equilibrium position is unpredictable

What is the effect of increasing the temperature on the value of the equilibrium constant for an exothermic reaction?

• The equilibrium constant remains unchanged
• The equilibrium constant decreases
• The effect of temperature cannot be predicted
• The equilibrium constant increases