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Wednesday, 10 March 2021

10 Science - Testing pH

 Testing pH


Aim: To test the pH of a range of household chemicals.


Method:

  1. Add a few drops of each chemical toa 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. Test the chemicals with litmus paper.

  3. 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

Dishwashing Liquid

Blue

Violet

Green

Vinegar

Red

Red

Red

Toilet Cleaner

Red

Red

Red

Spray and WIpe

Indigo

Indigo

Blue


Conclusion:


Chemical being Tested

Acid or base

Evidence from investigation

Dishwashing Liquid

Weak base

The blue litmus was blue, the red litmus was violet and the UI was green.

Vinegar

Weak acid

They were light red almost orange.

Toilet cleaner

Strong acid

Both the litmus and Universal Indicator Were dark red.

Spray and wipe

Strong base

Both of the litmus and Universal Indicator were a dark blue/ Indigo.

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