10.5 The equilibrum constant Kc - part 1

Question 1

What is the equilibrium constants Kc?

Answer 1

A measure of the position of equilibrium; the magnitude of an equilibrium constant indicates whether there are more reactants or more products in a equilibrium system

Question 2

What is the equation to calculate Kc?

Answer 2

[products] / [reactants]

Question 3

What does using square brackets mean?

Answer 3

Shorthand for ‘the concentration of’

Question 4

What are the units for concentration?

Answer 4

mol/dm3 (mol-1dm3)

Question 5

What does a Kc value of 1 tell us?

Answer 5

Indicates the position of equilibrium is halfway between the reactants and products

Question 6

What does a Kc value of greater than 1 tell us?

Answer 6

Indicates the position of the equilibrium is towards the products (the right hand side), the concentration of the products is greater as Kc increases compared to the reactants

Question 7

What does a Kc value of less than 1 tell us?

Answer 7

Indicates the position of the equilibrium is towards the reactants (the left hand side)