Unit One, Chapter Ten - Chemical Equilibrium And The Ionic Product of Water Flashcards
1
Q
The Brønsted-Lowry definitions of acids and bases state…
A
that an acid is a proton donor, and a base is a proton acceptor
2
Q
For every acid there is…
A
a conjugate base formed by the loss of a protein
3
Q
For every base there is…
A
a conjugate acid formed by the gain of a proton
4
Q
What does amphoteric mean, and give an example
A
Water -> can act as an acid or a base
5
Q
What does Kw stand represent
A
The dissociation constant for the ionisation of water
6
Q
The value of Kw varies with…
A
temperature
7
Q
At 25°C, the approximate value of Kw =
A
1x10^-14
8
Q
In water and aqueous solutions with a pH of 7, concentrations of H3O+ (H+) and OH- are…
A
both 10^-7 mol l^-1 at 25°C
9
Q
What is pH + pOH = 14 used for
A
To calculate the concentration of either H3O+ or OH- when concentration of one is known
