Equilibrium Expressions and Constants

The video tutorial explains how to calculate the equilibrium constant (Kc) for the reaction of nitrogen with chlorine to produce nitrogen trichloride. It begins with the problem statement, detailing the concentrations of gases at equilibrium. The tutorial then explains the law of mass action, which involves placing products in the numerator and reactants in the denominator, with coefficients as exponents. The video walks through the calculation process, resulting in a Kc value of 106.67. The tutorial concludes with a summary and invitation for questions.

What are the equilibrium concentrations of nitrogen gas and chlorine gas in the reaction?

• 0.15 M and 0.50 M

• 0.50 M and 0.15 M

• 0.25 M and 0.50 M

• 0.15 M and 0.25 M

What is the concentration of nitrogen trichloride at equilibrium?

• 0.25 M

• 0.75 M

• 0.15 M

• 0.50 M

According to the law of mass action, where do the products appear in the equilibrium expression?

• As exponents

• As coefficients

• In the numerator

• In the denominator

What is the exponent for chlorine gas in the equilibrium expression?

• 1

• 2

• 3

• 0

How is the concentration of nitrogen gas represented in the equilibrium expression?

• Raised to the power of 3

• Raised to the power of 1

• Raised to the power of 2

• Raised to the power of 0

What is the first step in substituting values into the equilibrium expression?

• Start with the reactants

• Start with the products

• Use the coefficients

• Use the exponents

What is the power to which the concentration of nitrogen trichloride is raised?

• 0

• 1

• 3

• 2

What is the calculated value of the equilibrium constant Kc?

• 100.67

• 106.67

• 110.67

• 116.67

What is the significance of the equilibrium constant value?

• It measures the pressure of the gases

• It determines the temperature of the reaction

• It shows the ratio of products to reactants at equilibrium

• It indicates the speed of the reaction

What should you do if you have further questions about the topic?

• Ask a friend

• Search online for answers

• Leave a comment below the video

• Rewatch the video