Seperating mixtures

Question 1

what is a mixture

Answer 1

A mixture is two or more different atoms that are not chemically joined and can be separated easily

Question 2

Name an example of a mixture

Answer 2

sand and water

Question 3

What is filtration used for

Answer 3

to separate an insoluble solid from a solvent

Question 4

What is a solvent

Answer 4

a liquid

Question 5

What is the first step of filteration

Answer 5

Pour your solution into the filter paper sitting on top of the funnel that is connected to the conical flask

Question 6

What is the second step of filtration

Answer 6

The sand will remain in the filter paper as residue

Question 7

What is the third step of filtration

Answer 7

The water will travel through the funnel into the conical flask and become filtrate

Question 8

What is the use of evaporation and crystallization

Answer 8

To seperate a soluble substance from a solution

Question 9

Name an example of a mixture you would use for crystallization or evaporation

Answer 9

Salt and water

Question 10

What is first step of crystallization/evaporation

Answer 10

Pour your mixture into the evaporating dish/basin

Question 11

What is the second step of crystallization/evaporation

Answer 11

Then heat it using a bunsen burner,

Question 12

What is the third step of crystallization/evaporation

Answer 12

The water will then evaporate and leave behind salt crystals

Question 13

What is the use of simple distillation

Answer 13

Separate a liquid solvent from dissolved substances

Question 14

What is the first step of simple distillation

Answer 14

put your mixture into the round bottom flask

Question 15

What is the second step of simple distillation

Answer 15

Then heat it using a bunsen burner and the liquid will evaporate turning it into gas

Question 16

What is the third step of simple distillation

Answer 16

Then it travels into the condenser which is cold turning it into a liquid

Question 17

What is the fourth step of simple distillation

Answer 17

Then you can collect your distillate in a conical flask

Question 18

What is chromatography

Answer 18

the separation technique used to separate a mixture of colours and dyes

Question 19

What happens when you put the filter paper straight into the water

Answer 19

the colours will wash into the water

Question 20

Why do you draw your line with a pencil

Answer 20

Because pencil won’t mix with ink

Question 21

What does it mean when the ink separates

Answer 21

that means it’s made up from more than one colour

Question 22

if it only has one colour what does it mean

Answer 22

it is a pure subsatnce

Question 23

What is the first step oof chrmotography

Answer 23

Put the spots at regular intervals on the pencil line

Question 24

What is the second step of chromatography

Answer 24

You put a small amount of water in a beaker and place the filter paper in it but make sure the pencil line is above the water

Question 25

What is the third step of chromatography

Answer 25

The water will travel up the paper causing the ink to either separate into several colours or to be one colour

Question 26

The one that travels the least up the paper ..

Answer 26

is the least soluble

Question 27

The one that travels the furthest up the paper…

Answer 27

is the most soluboe

Question 28

What is a moblile phase

Answer 28

water

Question 29

What is a stationary phase

Answer 29

filter paper

Question 30

how are substances seperateed

Answer 30

based om how attracted they are to the stationary or mobile phase

Question 31

What happens if thwe ink doesn’t move from the line

Answer 31

it means it’s not soluble in that solvent

Question 32

How do you calcute the rf value

Answer 32

distance moved by substance/distance moved by solvent

Question 33

How do you measure rf value

Answer 33

Pyt a line in the middle of the separated colour and draw a straight line to the pencil line