12.1.3 - The ionic product of water Kw Flashcards
1
Q
What is the Kw of water at 298K?
A
1*10^-14
2
Q
Why is pure water neutral?
A
Water dissocates to give an equal number of H+ and OH- ions
3
Q
What happens to strong bases in water?
A
They completely dissociate
4
Q
If you have the concentration of a strong base, what is this value also equal to?
A
The concentration of OH- ions
5
Q
Is the dissociation of water exo or endothermic?
A
Endothermic as heat is required in the form of energy to break bonds down into products
6
Q
What happens to the pH of water as temperature increases?
A
pH lowers
7
Q
Why does the pH of water decrease at higher temperatures?
A
Forward reaction of the dissociation of water is endothermic so an increase in pressure favours the production of H+ ions.
