Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry gcse ocr a > C4 > Flashcards

C4 Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Geography - AQA flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

Hydrogen gas test

A

Lighted splint ignites with pop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Oxygen gas test

A

Glowing splint relights

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Chlorine gas test

A

Damp blue litmus paper turns red then white

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Carbon dioxide gas test

A

Turns limewater cloudy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Reactivity series

A

Potassium,sodium,calcium,magnesium,aluminium,zinc,iron,tin,lead,(hydrogen),copper,silver,gold,platinum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Flame test

A

Nichrome wire cleaned in dilute HCl before every test, held in flame until no flame colour is produced and then dipped in solution and put in flame, colour observed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Lithium flame test

A

Red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Sodium flame test

A

Yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Potassium flame test

A

Lilac

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Calcium flame test

A

Orange-red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Copper flame test

A

Green-blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Hydroxide precipitate test

A

Sodium hydroxide added to form metal hydrogen precipitate

Eg- NaOH + CuX -> NaX + CuOH(precipitate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Iron(II) precipitate test

A

Green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Iron(III) precipitate test

A

Orange-brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Copper precipitate test

A

Blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Calcium precipitate test

A

White

17
Q

Zinc precipitate test

A

White (dissolves in excess NaOH)

18
Q

Halide ion test

A

Dilute nitric acid and silver nitrate added to produce silver halide

19
Q

Chloride precipitate

A

White

20
Q

Bromine precipitate

A

Cream

21
Q

Iodide precipitate

A

Yellow

22
Q

Why isn’t HCl used in the halide ion test?

A

Hcl has chloride ions, which may lead to a false positive in the test

23
Q

Sulphate ion test

A

Dilute Hydrochloric acid and barium chloride to for barium sulphate (white precipitate)

24
Q

Carbonate ion test

A

Add dilute nitric acid, collect gas produced (seen by bubbles) and do carbon dioxide limewater test

25
Q

Alkali metals properties

A

Shiny, mostly solid at 20c, float on water,reactive, group 1

26
Q

Alkali metal properties (going down group)

A
  • increasing reactivity
  • decreasing melting point
  • decreasing hardness
  • increasing density
27
Q

Halogens properties

A

Non metals, reactive, forms salt when reacted with metals

28
Q

Halogen properties (going down the group)

A
  • increasing melting point
  • decreasing reactivity
  • increasing boiling point
  • increasing density
29
Q

Why does the reactivity decrease as you go down group 7 but increase as you go up group 1?

A
  • group 1 are metals, metals lose electrons on their outer shells
  • Having a shell further away from the nucleus means that the attraction of opposite charges between the nucleus and the outer electrons is weaker.This means that it is easier for the atom to lose its outer electrons.
  • this makes group 1 elements more reactive as more electron shells are present
  • group 7 are non metals , non metals lose electrons on their outer shells
  • Having a shell further away from the nucleus means that the attraction of opposite charges between the nucleus and the outer electrons is weaker.This means that it is harder for the atom to gain outer electrons.
  • this makes group 7 elements less reactive as more electron shells are present
30
Q

Fluorine

A

Pale yellow gas

31
Q

Chlorine

A

Yellow/green gas

32
Q

Bromine colour

A

Reddish-brown liquid

33
Q

Iodine

A

Shiny grey solid (sublimes to purple vapour)

34
Q

Astatine

A

Black solid

35
Q

Nobel gases properties

A

gases at room temperature, inert, group 0

36
Q

Nobel gases properties (going down group)

A
  • increasing melting point
  • increasing boiling point
  • increasing density (because density of gases at room temp remain the same but the molar mass increases)
37
Q

Transition metals properties

A

Form coloured ions,multiple oxidation states, catalysts, malleable, shiny, higher melting points and less reactive than group 1 elements, mostly form 2+ ions.

38
Q

Benefits of instrumental methods of analysis

A
  • More sensitive to smaller substances
  • Much more accurate
  • Much more quicker

Chemistry gcse ocr a (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions