purity and formulations

Question 1

what is a pure substance

Answer 1

a pure substance is not mixed with any other substance

Question 2

what can measuring a boiling and melting point of a substance tell us

Answer 2

if it’s pure or not

Question 3

what are the key facts about pure substances

Answer 3

A pure substance melts at a specific fixed temperature

A pure substance also has a specific fixed boiling point

Question 4

name a key fact about impure substances

Answer 4

Impure substances melt and boil over a range of temperatures

Question 5

Name the difference between a pure substance and impure substances regarding temperature

Answer 5

Pure substances have a specific fixed boiling point but impure substances melt and boil over a range of temperatures

Question 6

Difference between pure substances and impure substances on a graph

Answer 6

Pure substances have a specific fixed temperature meaning it will align ‏ and impure substances melt and boil over a range of temperatures and do not align

Question 7

what does a horizontal line on a graph show

Answer 7

melting point and boiling point

Question 8

What are formulations

Answer 8

a formulation is a complex mixture that has been designed as a useful product

Question 9

How do we ensure that the product of a formulation has the properties we need

Answer 9

In a formulation the quantity of each component is carefully measured so that the product has the properties we need

Question 10

name some examples of formulations

Answer 10

fuels
cleaning products
paints
medicines
allies
fertilisers
food