Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Processing. Please wait.

 Form 1 Chemistry: Acids, bases and indicators online lessons

What is a PH scale ?

 (4m 47s)
410 Views     SHARE

Download as pdf file

Answer Text:
The pH scale.
- Is a scale of numbers which shows the strength of acids or bases.
- It refers to the potential (power) of hydrogen;
- It ranges from 0 – 14;
- To determine the strength of an acid or base, the colour it gives in universal indicators solution is compared to the shades on the pH chart of the indicator;
Diagram: The pH scale.
- The strongest acid has a pH of 1;
- The strongest alkali has a pH of 14;
- Neutral substances have a pH of 7;
- Any pH less than 7 is acidic solution; while any pH above 7 is for a alkaline / basic solution;