4. Chemical Changes (strong and weak acids) Flashcards
1
Q
What is 1dm3 equal to?
A
1000cm3
2
Q
What is a strong acid?
A
An acid that is completely ionised in aqueous solution
3
Q
What are examples of strong acids?
A
- hydrochloric acid
- nitric acid
- sulfuric acid
4
Q
What is a weak acid?
A
An acid that is only partially ionised in aqueous solution
5
Q
What are examples of weak acids?
A
- ethanoic acid
- citric acid
- carbonic acid
6
Q
What does a stronger acid mean (for a given concentration of aqueous solution)?
A
the lower the pH
7
Q
As the pH decreases by one unit, what happens to the H+ concentration of the solution?
A
As the pH decreases by one unit, the H+ conc. of the solution increases by a factor of 10.
8
Q
Do strong & weak and concentrated & dilute mean the same thing?
A
- No, concentrated and dilute refers to the amount of substance in a given volume
- While strong and weak refers to the H+ ion concentration in aqueous solutions
