Equilibrium Constant Kc Concepts

This video tutorial by Matt from chemistrystudent.com covers the equilibrium constant Kc, explaining what equilibrium constants are, how to calculate Kc and its units, and the relationship between Kc values and equilibrium positions. It also touches on reversible reactions, dynamic equilibrium, and the effects of temperature on Kc. The video provides a detailed explanation of how to interpret Kc values and includes examples to illustrate these concepts. Additional resources are available on chemistrystudent.com.

What is the primary focus of this video tutorial?

• Acid-base reactions

• Chemical bonding

• The periodic table

• The equilibrium constant Kc

In a reversible reaction, what happens when the rates of the forward and reverse reactions are equal?

• The reaction speeds up

• The reaction becomes irreversible

• Dynamic equilibrium is reached

• The reaction stops

How is the equilibrium constant Kc calculated?

• By subtracting the concentration of products from reactants

• By multiplying the concentrations of reactants

• By dividing the concentrations of products by reactants

• By adding the concentrations of reactants and products

What is the significance of the square brackets in the Kc expression?

• They denote the volume

• They indicate the temperature

• They represent the concentration of substances

• They show the pressure

What does a Kc value greater than 1 indicate about the position of equilibrium?

• It is in the middle

• It lies to the left

• It lies to the right

• It is unstable

What does a Kc value of 1 signify about the concentrations of reactants and products?

• The reaction is incomplete

• Reactants are greater than products

• They are balanced

• Products are greater than reactants

What does the equilibrium law describe?

• The color change in a reaction

• The energy change in a reaction

• The ratio of products to reactants at equilibrium

• The speed of a reaction

What happens to the Kc value when the temperature changes?

• It remains constant

• It halves

• It changes

• It doubles

According to Le Chatelier’s principle, what happens when the concentration of a product is increased?

• The reaction stops

• The equilibrium remains unchanged

• The equilibrium shifts to produce more reactants

• The equilibrium shifts to produce more products

What is the only factor that can change the value of Kc?

• Volume

• Temperature

• Concentration

• Pressure