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Chemistry > Group 7 > Flashcards

Group 7 Flashcards

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1
Q

What is the appearance of fluorine at room temperature?

A

gas
lighter colour than chlorine

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2
Q

What is the appearance of Chlorine at room temperature?

A

gas
pale green

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3
Q

What is the appearance of Bromine at room temperature?

A

liquid red/brown
very easily turns into a gas

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4
Q

What is the appearance of Iodine at room temperature?

A

solid
grey

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5
Q

What is the appearance of Astatine at room temperature?

A

solid
dark grey/black

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6
Q

Why does reactivity decrease as you go down group 7?

A

all need to gain 1 electron
down the group, there are more electron shells
weaker attraction between the nucleus and incoming electron
hard to gain electron therefore less reactive

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7
Q

Reactivity series?

A

Potassium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Hydrogen
Copper
Silver

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8
Q

Chlorine + Potassium bromide ->
colour change?

A

Bromine + Potassium chloride
red / orange solution

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9
Q

Bromine + Potassium chloride ->
colour change?

A

no reaction

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10
Q

Iodine + Potassium chloride ->
colour change?

A

no reaction

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11
Q

Chlorine + potassium iodide ->
colour change?

A

Iodine + potassium chloride
brown solution

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12
Q

Iodine + potassium bromide ->
colour change?

A

no reaction

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13
Q

Bromine + Potassium iodide ->
colour change?

A

Iodine + Potassium bromide
darker brown solution

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14
Q

What is the difference between chlorine and chloride?

A

chlorine = Cl
chloride = Cl⁻⁻

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15
Q

What is the test for cl₂?

A

damp blue litmus paper bleaches / turns white

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16
Q

How do you make hydrogen chloride?

A

H₂ + Cl₂ -> 2HCl
(colourless) (green) (colourless)

17
Q

Dissolving HCl into water?

A

HCl disociates -> H⁺(aq) + Cl⁻⁻(aq)
H+ is acidic therefore hydrochloric acid

18
Q

Dissolving HCl into methylbenzene (organic solvent)?

A

HCl doesn’t dissociate
no H⁺ therefore not acidic

Chemistry (18 decks)

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