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Chemistry🧪 > Inorganic Chemistry- Group 7 > Flashcards

Inorganic Chemistry- Group 7 Flashcards

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1
Q

Chlorine
Colour
State at room temp
Colour of aqueous solution
Colour in cyclohexane

A

Colour: Green
State at room temp: Gas
Colour of aqueous solution: Pale green
Colour in cyclohexane: Pale green

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2
Q

Bromine
Colour
State at room temp
Colour of aqueous solution
Colour in cyclohexane

A

Colour: Brown
State at room temp: Liquid
Colour of aqueous solution: Orange
Colour in cyclohexane: Orange

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3
Q

Iodine
Colour
State at room temp
Colour of aqueous solution
Colour in cyclohexane

A

Colour: Black
State at room temp: Solid
Colour of aqueous solution: Brown
Colour in cyclohexane: pink/purple

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4
Q

Define oxidising agent

A

Accepts electrons

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5
Q

Why are halogens oxidising agents?

A

They accept electrons to form halide ions

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6
Q

Define disproportionation

A

The same element is being reduced and oxidised

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7
Q

Reaction of chlorine with water

A

Cl2 + H2O ->/<- HCl + HClO

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8
Q

Observation
Chlorine
HCl
HClO

A

Chlorine- pale green solution
HCl- turns litmus paper red
HClO- bleaches litmus paper

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9
Q

Reaction of chlorine with water in sunlight

A

Cl2 + H2O -> 2HCl + 1/2O2

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10
Q

Benefits and risks of using chlorine in water treatment

A

Kills bacteria
Toxic in large quantities

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11
Q

Reaction of chlorine with NaOH

A

Cl2 + 2NaOH -> NaCl + NaClO + H2O

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12
Q

Test for halide ion

A

Add dilute AgNO3
Add silver nitrate solution

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13
Q

What dissolves in dilute ammonia?

A

Just silver chloride

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14
Q

What dissolves in excess ammonia?

A

Silver chloride
Silver bromide

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15
Q

Define a reducing agent

A

Donates electrons

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16
Q

Why are halides reducing agents?

A

They donate electrons to become halogens

17
Q

Observation of SO2

A

Chocking acidic gas

18
Q

Observation of S

A

Yellow solid

19
Q

Observation of H2S

A

Gas with bad egg smell

20
Q

Acid base observation of halides reacting with concentrated H2SO4

A

Steamy white fumes

21
Q

Chlorine and H2SO4

A

NaCl + H2SO4 -> NaHSO4 + HCl

22
Q

What does the H2SO4 act as in the acid base reaction?

A

Acid

23
Q

What does the H2SO4 act as in the redox reaction?

A

Oxidising agent

Chemistry🧪 (15 decks)

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