Acid and Bases

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 powered you will need to mix it a few drops of water before testing it.

Test the chemical with litmus paper.

Test each chemical with a few drops of Universal Indicator

Results:

Chemical being tested	Colour in blue litmus	Colour in red litmus	Colour in Universal indicator
Vinegar	Turned Red	No change	A light red colour
Baking Soda	No change	Turned violet	A light blue colour
Fabric Softener	Turned Light red	Changed to a dark red	A orange colour
Spray & Wipe	Turned Light blue	Changed to a dark blue	A green colour

Chemical being tested	Acid or base?	Evidence from investigation
Vinegar	Acid- vinegar is an acid because when you add universal indicator it turns to a red	Turned Red
Baking Soda	Base- This is a base because when its added to the universal indicator it turns a blue and on the pH scale that's a base colour	Turned Blue
Fabric Softener	Acid-is an acid because when you add universal indicator it turns to a a pasific colour	Turned a red-ish orange
Spray & Wipe	Neutral- Its a colour that stays in the middle meaning its green	Green