Testing pH
Aim: To test the pH of a range of household chemicals.
Equipment: A variety of household chemicals, spotting tile, red litmus paper, blue litmus paper, universal indicator solution, safety glasses.
Method:
- Add a few drops of each chemical to a spot on your spotting tile. If a substance is solid or powdered you will need to mix it with a few drops of water before testing it.
- Test the chemicals with litmus papers.
- Test each chemical with a few drops of universal indicator.
Results:
Chemical being tested
|
Colour in blue litmus
|
Colour in blue litmus
|
Colour in Universal indicator
|
Harpic
|
red
|
red
|
yellow
|
Easy off BAM
|
blue
|
blue
|
black
|
Dettol
|
red
|
red
|
yellow
|
Pledge
|
blue
|
red
|
yellow
|
Pledge clean and dust
|
red
|
red
|
orange
|
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