Testing pH

Aim:                         To test the pH 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. Add a few drops of each chemical to a spot on your spotting tile. If a substance is solid or powered you will need to mix it with a few drops of water before testing
                                 2. Test the chemicals with litmus paper
                                 3. Test each chemical with a few drops of Universal indicator. 

Results:

Chemicals being tested	Colour in blue litmus	Colour in red litmus	Colour in Universal Indicator
Harpic Active Fresh (Toilet Cleaner)		It turned blue	It turned yellow
Pledge clean and dust	It turned purple		Orange
Easy off BAM Bleach Hygiene	Remained blue	Blue	Purple with a hint of green
Dettol Multipurpose Cleaner		Remained red	Yellow
Dishwashing liquid	Remained the same		green

Universal indicator:
The universal indicator shows us how strongly acidic or alkaline the solution is. It also has many different colour changes, from red for strong acids to dark purple for strong bases,In the middle neutral pH 7 is indicated by green.


Litmus indicator:

Litmus indicator solution turns red in acidic solutions and blue in alkaline solutions. Litmus also comes in paper form. Blue litmus paper will turn red in an acidic solution and remain blue when added to an alkali solution. Litmus does not tell you how strong the solution is.