Embedded Files
Episode 5
Task 1 - DO now
Task 1 - DO now
Answer the recall questions.
Task 2 -Think back
Task 2 -Think back
Which of these substances do you think are pure? A, B, C or D.
Answer the question on the comapnion sheet.
Task 3
Task 3
Whats the difference?
Whats the difference?
Read the key facts belowand then complete the task on the companion sheet to confirm your knowledge
Key FActs - Purity and mixtures
Key FActs - Purity and mixtures
The word 'pure' is used in chemistry in a different way from its everyday meaning. For example, shops sell cartons labelled as ‘pure' orange juice. The label means that the contents are just orange juice, with no other substances added. However, the juice is not pure in the chemical sense, because it contains different substances mixed together.
In chemistry
a pure substance consists only of one element or one compound
a mixture consists of two or more different substances, not chemically joined together
The substances in a mixture can be elements, or compounds, or both. Being part of a mixture does not change the chemical properties of the substances that are in it.
Task 4 - Introducing mixtures
Task 4 - Introducing mixtures
Watch the video on mistures and then answer the questions on the companion sheet.
Task - Mixtures - Key words
Task - Mixtures - Key words
Watch the video on the web page below and then match the key words to their correct definitions on your companion sheet
Task 6 - prove it
Task 6 - prove it
This carton of drink is advertised as “pure apple juice”.
On your companion sheet, explain in terms of chemistry, why this is not strictly true?
Use your knowledge of pure & impure substances to help you.
Heres a clue for you.
Page updated
Google Sites
Report abuse