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Chemistry - AS Level > ES 1 > Flashcards

ES 1 Flashcards

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1
Q

What are halogens?

A

The elements in group 7 of the periodic table

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2
Q

What are halides?

A

Group 7 ions or salts

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3
Q

Are all halogens diatomic?

A

Yes

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4
Q

How do halogen atoms achieve stability?

A
  • gaining an electron from a metal atom
  • which forms a halide ion compound
    -OR
  • Sharing an electron from another non-metal atom in a covalently bonded compound
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5
Q

Appearance of F2 at room temp

A

Pale yellow gas

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6
Q

Appearance of Cl2 at room temp

A

Green gas

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7
Q

Appearance of Br2 at room temp

A

Orange liquid

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8
Q

Appearance of I2 at room temp

A

shiny grey/ black solid

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9
Q

What happens to reactivity down group 7?

A

Decreases

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10
Q

What happens to MP/BP down group 7?

A

Increases

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11
Q

Which element in group 7 is the best oxidising agent?

A

Flourine (top)

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12
Q

What are spectator ions?

A

Ions that are left out of ionic equations because they are unchanged

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13
Q

What gets reduced in a halogen + halide ion reaction?

A

The oxidising agent (the halogen)

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14
Q

Half equation for halogen

A
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15
Q

What is a silver halide?

A

A precipitate

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16
Q

When are silver halides precipitated?

A

When a silver ion is added to a solution containing any halide

17
Q

Ag+(aq) + X-(aq) ->

A

AgX(s)

18
Q

What colour is AgCl?

A

White precipitate

19
Q

What colour is AgBr?

A

Cream precipitate

20
Q

What colour is AgI?

A

Pale yellow precipitate

21
Q

Observations when AgNO3 is added to Cl-

A

White precipitate

22
Q

Observations when AhNO3 is added to Br-

A

Cream precipitate

23
Q

Observations when AhNO3 is added to I-

A

Yellow precipitate

24
Q

What happens when you add NH3 to Cl-, Br- or I-?

A

Cl- dissolves in dilute ammonia
Br- dissolves in concentrated ammonia
I- does not dissolve

25
Q

What happens to solubility down group 7?

A

Decreases

26
Q

What is observed when a sodium halide gas is produced?

A

Steamy white fumes

27
Q

What is the trend in reducing ability of halide ions?

A

Increases down the group

28
Q

What are the Colours of the elements in vapor state down group 7?

A

Colourless
Yellow
Orange
Purple
Dark purple

29
Q

Color of aqueous Cl, Br and I

A

Chlorine - pale green
Bromine - orange
Iodine - Brown

30
Q

Colours of Cl, Br and I in cyclohexane

A

Cl - pale green
Br - red/brown
I - violet/purple

31
Q

Cl, Br, I appearance and state a RT

A

Cl - green gas
Br - orange liquid
I - Dark grey solid

32
Q

How to test for halide ions

A

Add AgNO3

33
Q

Ag+ (aq) + Cl-(aq) —> ?

A

AgCl

Chemistry - AS Level (39 decks)

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