How to calculate Ph of strong base and weak acid Flashcards
1
Q
For bases what concentrations are usually given?
A
= hydroxide ion
2
Q
But to work out PH what do we need?
A
H+ ion concentration
= use kw equation
3
Q
What are weak acids?
A
= partially dissociate when dissolved in water
4
Q
What does the equation simpligy to?
A
= Ha => H+ + A-
5
Q
What is the Ka expression?
A
= [H+][A-]/[HA]
= larger the ka the stronger the acid
6
Q
How do we convert pka into ka?
A
= Ka= 10-pka
