pH, acids and bases. OCR

A quiz to remind about what acids and bases are and how to find the pH of bases, weak acids and strong acids .

HideShow resource information
  • Created by: Ruth
  • Created on: 06-05-10 16:08
What is an acid?
A species that donates a proton.
1 of 9
What is an example of a tri-basic acid?
H3PO4
2 of 9
What does H3O+ represent in an acid-base pair equation?
H+ ions.
3 of 9
What is pH?
-log(H+)
4 of 9
What do strong acids do that weak acids don't do fully?
Dissociate
5 of 9
What is the units of Ka? (acid dissociation constant)
mol dm-3
6 of 9
What assumption is made concerning [HA] in finding Ka?
[HA] remains unchanged.
7 of 9
What would a small Ka value indicate?
little dissociation and so, a weak acid
8 of 9
What is the value of Kw (the ionic product of water) at 25'C ?
1.00 x 10^ -14 mol^2 dm^-6
9 of 9

Other cards in this set

Card 2

Front

What is an example of a tri-basic acid?

Back

H3PO4

Card 3

Front

What does H3O+ represent in an acid-base pair equation?

Back

Preview of the front of card 3

Card 4

Front

What is pH?

Back

Preview of the front of card 4

Card 5

Front

What do strong acids do that weak acids don't do fully?

Back

Preview of the front of card 5
View more cards

Comments

Charli Parvin

Report

Question 2? A di basic acid can...? and then the options are true or false... dont think that works! just some con crit :)

Ruth

Report

Thanks, didn't even notice I'd done it :)

Philippa Adams

Report

For question 9 I think it might be better if you specify 'for a buffer solution', because the equation for [H+] will be different depending on what type of solution it is (strong acid, weak acid solution etc), meaning that question could be true or false. Just a suggestion :)

Similar Chemistry resources:

See all Chemistry resources »See all Acids, bases and salts resources »