Inquiry Q#3: How Can The Position Of Equilibrium Be Described And What Does The Equilibrium Constant Represent

Question 1

What is an equilibrium expression?

Answer 1

The ratio of concentration of products on right side the ratio of concentration of reactants on left side.
Keq= [C]c x [D]d / [A]a x [B]b

Question 2

What are homogenous reactions?

Answer 2

A chemical reaction that occurs in one single phase

Question 3

What matter are excluded from the equilibrium expression?

Answer 3

Solids and liquids because their concentrations stay constant through the reaction

Question 4

What is Q?

Answer 4

Measures the relative amounts of product and reactants present during a reaction at a particular point in time.

Question 5

What are the relationship between Q and Keq?

Answer 5

Q=Keq - the reaction has reached equilibrium

QKeq - the products need to be decreased, so the reaction proceeds in reverse direction to reach equilibrium

Question 6

When is an ICE table used and what does it look like?

Answer 6

Used when values of substances in a system at equilibrium are unknown
[A]. [B]. [C]. [D]
Initial
Change
Equilibrium