testing pH

                            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: 
1 step - 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.
2 step -  test the chemicals with litmus papers.
3 step -  Test each chemical with a few drops of Universal Indicator.


Result:

Chemical being tested	Colour in blue litmus	Colour in red 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 & dust	red	red	orange

Conclusion:

 Blue litmus paper turns red under acidic condition and red litmus paper turns blue under basic or alkaline conditions, Neutral litmus paper is purple.