Equilibrium Constants and Concentrations

The video tutorial explains how to organize chemical reaction data using a table, starting with the reaction equation to understand mole ratios. It covers calculating initial moles and concentrations, determining moles at equilibrium, and using mole ratios to find the moles of reactants and products. Finally, it demonstrates calculating the equilibrium constant KC, emphasizing the importance of converting moles to concentrations and understanding the units involved.

What is the mole ratio of carbon-carbon double bonds to hydrogen chloride in the reaction?

• 1:1

• 2:1

• 1:3

• 1:2

What is the initial concentration of chloroalkane in the reaction?

• 0 moles

• 0.5 moles

• 0.135 moles

• 0.270 moles

How is the concentration of alkene at equilibrium calculated?

• By dividing initial moles by volume

• By adding initial moles

• By subtracting reacted moles from initial moles

• By multiplying initial moles by volume

What is the mole ratio of reactants to products in this equilibrium reaction?

• 2:1:1

• 1:1:1

• 1:2:1

• 1:1:2

How many moles of chloroalkane are produced at equilibrium?

• 0.270 moles

• 0.179 moles

• 0.135 moles

• 0.5 moles

What does the equilibrium constant (KC) represent in this reaction?

• The ratio of initial concentrations

• The ratio of product concentration to reactant concentrations at equilibrium

• The total moles of products

• The total moles of reactants

How do you convert moles to equilibrium concentrations?

• By subtracting the volume

• By adding the volume

• By dividing by the volume

• By multiplying by the volume

What is the calculated value of KC for this reaction?

• 1.07

• 2.07

• 3.07

• 4.07

What are the units of KC in this reaction?

• moles^2/dm^6

• moles/dm^6

• moles^2/dm^3

• moles/dm^3

Why is it important to use concentrations instead of moles when calculating KC?

• Because concentrations account for volume

• Because moles are too large

• Because moles are not accurate

• Because concentrations are easier to measure