Chemistry Paper 1 REAL

?
  • Created by: IJM22
  • Created on: 03-02-19 10:22
What is an element?
When all the atoms are the same
1 of 21
How many elements are there?
Around 100
2 of 21
What is the symbol for magneisum?
Mg
3 of 21
What is the symbol for suflur?
S
4 of 21
What are compounds?
Two or more different elements chemically combned in a fixed proportion
5 of 21
Name a key factor about compounds?
They usually have different properties to the elements that they're made from
6 of 21
How do you seperate a compound back into its elements?
By using a chemical reaction
7 of 21
What is a mixture?
When we have different elements or compounds not chemically combined together
8 of 21
How do you seperate mixtures?
By using physical techniques e.g. filtration, distillation or crstallization
9 of 21
What is correct about a molecule?
It has any elements chemically joined
10 of 21
What is filtration used for?
To separate an insoluble solid from a liquid
11 of 21
What is cystallisation used for?
To separate a soluble solid from a liquid
12 of 21
What is simple distillation used for?
To separate a liquid from a solid
13 of 21
What does fractional distillation allow us to do?
Separate two different liquids
14 of 21
How does simple distillation work?
1) First we evaporate the liquid by heating 2) We then condense the vapour by cooling
15 of 21
Why is simple distillation not used for drinking water?
As a great deal of energy is required for simple distillation
16 of 21
What happens in fractional distillation?
We seperate a mixture od different liquids
17 of 21
What is a key point in fractional distillation?
The liquids must have different boiling points
18 of 21
What factors do you need to consider when it comes to fractional distillation?
1) If the two liquids have got similar boiling points, then it is much harder to separate them 2) Using fractional distillation to purify large volumes of liquid e.g. crude oil require different equipment
19 of 21
What is a solvent?
A liquid that will dissolve substances
20 of 21
Why do we draw our starting line in pencil when it comes to paper chromatography?
Because if we drew the line in pen, the pen i
21 of 21

Other cards in this set

Card 2

Front

How many elements are there?

Back

Around 100

Card 3

Front

What is the symbol for magneisum?

Back

Preview of the front of card 3

Card 4

Front

What is the symbol for suflur?

Back

Preview of the front of card 4

Card 5

Front

What are compounds?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms resources »