7.2.2

Deduce the extent of a reaction from the magnitude of the equilibrium constant.

1. What does the word magnitude mean?
Magnitude is the size.

2. Explain why the three reactions above do not have units for Kc
The three reactions above do not have any units for Kc because the moles of the product is equal to the moles of the reactants.
E.g. 1+1=2

3. Deduce the extent of the reaction if Kc is
- Kc >>1 then the reaction is considered to go almost to completion
- Kc lies between 0.01 and 100 (10-2 and 102), both the products and the reactants are present in sufficient amounts.
- Kc <<1 the reaction hardly proceeds.