21.3- WEAK ACIDS AND BASES Flashcards
1
Q
What are weak acids?
A
only slightly ionised when dissolved in water
2
Q
Basic equation for the weak acid dissociation?
A
HA(aq) = H+(aq) + A-(aq)
3
Q
The larger the Ka value, what does this show?
A
further the equilibrium is to the right, more the acid is dissociated, and the stronger it is
4
Q
What is pKa?
A
pKa= -logKa
5
Q
What does pKa give a measure of?
A
how strong weak acid is-smaller the value of pKa, stronger the acid
