Equilibrium Constants in Chemical Reactions

The video tutorial explains the concept of equilibrium constants and how they are affected by changes in reaction conditions, such as reversing the reaction or altering the coefficients. It provides examples using oxalic acid and hydrofluoric acid reactions, demonstrating how to calculate new equilibrium constants when reactions are reversed or multiplied. The tutorial also covers combining reactions to find the equilibrium constant for a new reaction by multiplying the constants of the original reactions.

What is the equilibrium constant for the reaction of oxalic acid at 25 degrees Celsius?

• 3.8 x 10^-6

• 2.6 x 10^5

• 6.8 x 10^-4

• 4.6 x 10^-7

How does reversing a reaction affect its equilibrium constant?

• It squares the constant

• It doubles the constant

• It halves the constant

• It inverts the constant

What is the equilibrium constant for the reverse reaction of oxalic acid at 25 degrees Celsius?

• 2.6 x 10^5

• 4.6 x 10^-7

• 3.8 x 10^-6

• 6.8 x 10^-4

What is the new equilibrium constant when the hydrofluoric acid reaction is multiplied by a factor of two?

• 4.6 x 10^-7

• 2.6 x 10^5

• 3.8 x 10^-6

• 6.8 x 10^-4

What happens to the equilibrium constant if a reaction is multiplied by a factor of three?

• It is inverted

• It is squared

• It is cubed

• It remains unchanged

What is the equilibrium constant for the ionization of hydrofluoric acid at 25 degrees Celsius?

• 2.6 x 10^5

• 3.8 x 10^-6

• 4.6 x 10^-7

• 6.8 x 10^-4

What is the first step in calculating the equilibrium constant for a new reaction formed by combining two reactions?

• Add the equilibrium constants

• Subtract the equilibrium constants

• Reverse the first reaction

• Multiply the equilibrium constants

When combining reactions, what must be done to the equilibrium constant if a reaction is reversed?

• Halve the constant

• Double the constant

• Invert the constant

• Square the constant

In the final calculation, what is the equilibrium constant for the new reaction formed by combining the two modified reactions?

• 6.8 x 10^-4

• 4.6 x 10^-7

• 2.6 x 10^5

• 0.12

What is the result of multiplying the equilibrium constants of two reactions to find the constant for a new reaction?

• The sum of the constants

• The product of the constants

• The difference of the constants

• The average of the constants