Understanding Reaction Quotients and Equilibrium

What does the reaction quotient (Q) indicate about a chemical reaction?

• The speed of the reaction

• The temperature of the reaction

• The color of the reactants

• Whether the reaction is at equilibrium

In the hypothetical reaction, what is the equilibrium constant (K) at 25°C?

• 4

• 2

• 3

• 1

How is the concentration of a substance determined from a particulate diagram?

• By counting the number of particles

• By observing the color change

• By weighing the particles

• By measuring the temperature

If Qc is less than K, in which direction will the reaction proceed?

• To the left, forming more reactants

• To the right, forming more products

• It will stop

• It will reverse

What happens to the number of blue particles as the reaction progresses towards equilibrium?

• They decrease

• They remain constant

• They disappear

• They increase

When Q is greater than K, what does this indicate about the reaction?

• The reaction is at equilibrium

• There are too many products

• There are too many reactants

• The reaction is too slow

What is the net reaction direction when Q is greater than K?

• It speeds up

• To the right, forming more products

• To the left, forming more reactants

• It remains unchanged

In the decomposition of phosgene, what is the equilibrium constant (K) at 100°C?

• 2.2 x 10^-10

• 1.0 x 10^-8

• 6.0 x 10^-6

• 3.4 x 10^-6

What is the concentration of carbon monoxide used in the phosgene decomposition example?

• 3.4 x 10^-6 M

• 2.0 x 10^-3 M

• 6.0 x 10^-6 M

• 1.0 x 10^-8 M

What does a Qc value of 1.0 x 10^-8 indicate in the phosgene decomposition reaction?

• Qc is zero

• Qc is less than K

• Qc is equal to K

• Qc is greater than K