Year 10 Practical assessment - Acids and Bases

Year 10 Practical assessment - Acids and Bases

Year 10

Practical Assessment – Chemistry – Acids and Bases

Aim:

To measure the pH of several solids and liquids using universal indicator solution and a pH pen

Equipment:

Spotting tile

Universal indicator solution

Samples of several solids and liquids

pH pen

Method:

1.       Take two samples of each solid/liquid to be tested and arrange on your spotting tile. 

(If you are testing a solid add a drop of water and mix it before adding indicator)

2.       Place one drop of universal indicator on ONE of each sample.

3.       Use the pH pen to measure the pH of the other sample of each substance

Results:

Insert a photograph for each step you took in your method – see your teacher if you don’t have a phone.

Substance	Colour with pH	Description	pH Meter reading	Description
Eg. Substance A	Pale blue	Weak base	8.3	Weak base
Sugar
Lux flakes
Detergent
Toothpaste
Fruit juice
Window cleaner
Citric acid
Cheesels

Conclusion:

Write two or three sentences comparing the results from using universal indicator and the pH pen. Do they all agree? 

Write a sentence saying which method 

(universal indicator or pH pen is more useful when you are testing a coloured solution eg fruit juice)