19.1 the equilibrium constant Kc Flashcards Preview

Fckn Chemistry Module 5 > 19.1 the equilibrium constant Kc > Flashcards

Flashcards in 19.1 the equilibrium constant Kc Deck (5):
1

What is a homogenous equilibria?

It contains all equilibrium species in the same state

2

What is a heterogeneous equilibria?

It contains equilibrium species in different states

3

What states does Kc deal with?

Gaseous or aqueous

4

Why does Kc only deal with gaseous and aqueous?

The concentrations of solids and liquids remain essentially constant

5

Give an example of Kc be obtained from experimental results?

- Mix equal moles of carboxylic acid and alcohol with half moles of HCl as a catalyst in a flask
- add the same moles of HCl to another flask as a control
- stopper flasks and leave for a weak to reach equilibrium
- carry out titration of mixture with a standard solution of NaOH and repeat with control to determine the amount of acid catalyst used
- determine equilibrium amount of carboxylic acid (mol control - mol eq)
- determine equilibrium amounts of each component from equation
- find concentrations and then Kc