pH Paper Part 1 - Test for pH
Secondary | Materials | Views: 7322
You will Need:
- pH paper, which gives a number that shows how acidic a chemical is by changing colour. You can buy this cheaply or make your own!
- Straws
- Coca-Cola, or fizzy drink of your choice
- Milk
- Tap water
- Vinegar (cider and malt)
- Laundry detergent
- Table (make your own to record your results)
Health and Safety: As you can see in the video, Daniel is wearing goggles and an apron to protect his eyes and clothes. All chemicals are used in a small amount to avoid spillage, and everything takes place on a flat, safe surface with kitchen paper at the ready for spills!
What to Do:
- Cut a small piece of pH paper to go along with each liquid you will be testing. Make sure that your hands are dry when doing this!
- Add one drop of each liquid to its matching piece of pH paper.
- Use the pH scale to determine which colour matches each strip. What is the pH number?
- Record each pH number on your table of results. Is each liquid an acid, base or neutral?
- Remember, the smaller the number, the more acidic it is! Order your results by most to least acidic liquid. What does this tell you about these liquids?
- REMEMBER!
pH7 = neutral solution, such as water
less than 7 = acid
more than 7 = base
If you followed along with the liquids chosen in the video, perhaps you would like to investigate some different liquids around your house! Send us a photo of your results to askanambassador@canterbury.ac.uk or tag us on Twitter @STEMHUB_SE
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