Chem

Question 1

What are the particles arrangement in a solid?

Answer 1

Tightly compacted with a fixed arrangement

Question 2

What are the particles arrangement in a liquid?

Answer 2

Close together however have no fixed arrangement

Question 3

What are the particles arrangement in a gas?

Answer 3

Far apart and have no fixed arrangement

Question 4

What is a group?

Answer 4

A group is a column

Question 5

What is a period?

Answer 5

A row

Question 6

What is a element?

Answer 6

An element is 2 or more atoms that are the same

Question 7

What is an atom?

Answer 7

The smallest unit of ordinary matter

Question 8

What is a molecule?

Answer 8

A molecule is 2 or more non metal atoms that are chemically bonded together

Question 9

What is a mixture?

Answer 9

A mixture is a material made up of 2 or more different chemical substances

Question 10

What does it mean by solubility?

Answer 10

How soluble something is

Question 11

What does it mean by solute?

Answer 11

Something being dissolved in it

Question 12

What does it mean by solvent?

Answer 12

What is being dissolved

Question 13

What does it mean by soluble?

Answer 13

Whether something can dissolve

Question 14

What does it mean by insoluble?

Answer 14

Can’t dissolve

Question 15

What does it mean by solution?

Answer 15

A mixture of two or more substances

Question 16

What does it mean by miscible?

Answer 16

Two liquids that can fully mix together

Question 17

What does it mean by immiscible ?

Answer 17

Two liquids that can’t mix together

Question 18

What does it mean by filtrate

Answer 18

A liquid which has passed through a filter

Question 19

What does it mean by residue?

Answer 19

A small amount of something that remains after the main part has gone

Question 20

What does it mean by distillate?

Answer 20

Is a technique to separate two miscible liquids, where you heat both liquids and which ever has the lower boiling point will go to a gas and be condensed back to a liquid

Question 21

What are the laboratory safety rules?

Answer 21

• Wear safety specks
• wear lab coat
• hair tied back
• wash hands before/after
• don’t leave gas taps on
• etc.

Question 22

What types of flames are there on a Bunsen burner?

Answer 22

If hole is showing then it will be a friendly red fame. If hole is NOT showing then its a blue sharp flame

Question 23

What is diffusion?

Answer 23

Particles going from a high concentrated area to a low concentrated area eg. Spraying perfume to one area of the room then the whole room smells

Question 24

How does the size of particles effect the rate of diffusion?

Answer 24

The larger the particles the slower they will diffuse therefore the slower the diffusion rate

Question 25

What is the difference between chemical and physical change?

Answer 25

Chemical change are irreversible and always create a new compound while physical changes are reversible eg. Physical change= water to ice, chemical change= burning something

Question 26

What signs are usually given off to show a chemical change has occurred?

Answer 26

A gas given off, temperature change, colour change

Question 27

Is mass created or destroyed during a chemical reaction?

Answer 27

No

Question 28

Word equation for sodium chloride?

Answer 28

Sodium+chlorine—>sodium chloride

Question 29

What are some separating techniques?(8)

Answer 29

Dissolving, filtering, crystallisation, distillation, using a separating funnel, chromatography, fractional,distillation,

Question 30

What is dissolving?

Answer 30

A soluble solvent is mixed with the right liquid e to make a solution

Question 31

What is filtering

Answer 31

Using a funnel and filter paper to separate a solid from a liquid by passing the liquid e through the paper and the solid does not go through

Question 32

What is crystallisation

Answer 32

Separating two solids from each other

Question 33

What is distillation

Answer 33

Separating to misible liquids

Question 34

What is using a separating funnel

Answer 34

Sep earthing two immisible liquids

Question 35

What is chromatography

Answer 35

Separating different dyes or pigments

Question 36

What is fractional distillation

Answer 36

Separating two miscible liquids

Question 37

What test is used for carbon dioxide

Answer 37

Bubbles gas through limewater

Question 38

What test is used for hydrogen

Answer 38

Squeaky pop

Question 39

What test is used for oxygen

Answer 39

Relight a glowing splint

Question 40

What is waters melting and boiling point

Answer 40

Melting-0’C | Boiling- 100’C