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A- Level Chemistry > Inorganic Chemistry > Flashcards

Inorganic Chemistry Flashcards

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1
Q

reactions of group 2 metals w/ oxygen

A

2M + o2—-> 2MO

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2
Q

reactions of group 2 metals w/ chlorine

A

M + cl2—-> MCl2

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3
Q

reactions of group 2 metals w/ water

A

M+ H2O—–> M(OH)2 + H2

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4
Q

reaction of Mg w/ steam

A

Mg + H2O(g)—–> MO + H2

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5
Q

Test for SO4 ions

A

Add dilute HCL (to remove any carbonates)
Add Ba(NO3)2
If a white ppt forms- sulfate ions are present

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6
Q

Trend of group 2 hydroxides down the group

A

Get more soluble in water

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7
Q

Trend of group 2 sulfates down the group

A

Get less soluble in water

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8
Q

Trend of group 2 ionisation energy down the group and why

A

Decreases down the group-
Higher nuclear charge counteracted by:
Increased nuclei radius
Increase shielding effect

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9
Q

Trend of group 2 reactivity down the group

A

increases down the group

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10
Q

reaction of group 2 metal oxides/ hydroxides with dilute acids

A

forms metal salts and water (neutralisation reaction)

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11
Q

lesser decomposition of metal nitrates

A

2M(NO3)2——–> 2MNO2 + 2O2

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12
Q

greater decomposition of metal nitrates

A

2M(NO3)2——-> 2MO +4NO2 + O2

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13
Q

decomposition of metal carbonates

A

MCO3—–>MO +CO2

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14
Q

description of Cl2

A

Green gas

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15
Q

description of Br2

A

orange liquid

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16
Q

description of I2

A

black solid which can sublime to purple fumes

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17
Q

How to carry out a flame test

A

dip nichrome wire into concentrated HCl and dip into metal solid and place into burning flame and observe the colour

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18
Q

Colour of Li+

A

red

19
Q

Colour of Na+

A

yellow

20
Q

Colour of K+

A

lilac

21
Q

colour of Rb+

A

red

22
Q

colour of Cs+

A

blue

23
Q

colour of Be 2+

A

no colour

24
Q

colour of Mg2+

A

no colour

25
Q

colour of Ca2+

A

brick red

26
Q

colour of Sr 2+

A

crimson red

27
Q

colour of Ba2+

A

apple green

28
Q

test for NH4+

A

add OH- to sample

should produce NH3 which can turn damp red litmus paper blue

29
Q

trend of melting/ boiling points of halogens down the group

A

increases due to increase in number of electrons= stronger London forces

30
Q

tests for ammonia

A

add HCl to produce NH4Cl and white smoke should be produced

should turn damp red litmus paper blue

31
Q

why does HF have a larger boiling temperature than other group 7 hydrides?

A

HF has the largest electronegativity difference
HF is the only one that can form hydrogen bonds
Intermolecular forces are stronger

32
Q

Reaction of Cl2 and water

A

Cl2 + H2O——> HCl + HClO

33
Q

Reaction of Cl2 and cold, dilute NaOH

A

Cl2 + 2NaOH—-> NaCl + NaClO + H2O

34
Q

Reaction between Cl2 and hot concentrated NaOH

A

3Cl2 + 6NaOH——> 5NaCl + NaClO3 + 3H2O

35
Q

how do metal cations show colour?

A

when electrons gain thermal energy, they are promoted to a higher energy level
when the electrons demote back to ground state, they emit photons of visible light

36
Q

why do some metal cations not show colour?

A

the emitted radiation is not the visible light region

37
Q

Reactions of carbonates with hydrochloric acid

XCO3- +2HCl—->

A

XCl2+ H2O + CO3

38
Q

Colour of Cl in cyclohexane

A

No colour

39
Q

Colour of Br in cyclohexane

A

Orange

40
Q

Colour of cyclohexane in iodine

A

Purple

41
Q

Colour of Cl in water

A

Colourless

42
Q

Colour of bromine in water

A

Yellow/orange

43
Q

Colour of iodine in water

A

Brown

44
Q

Reaction of Cl with sulphuric acid

A

Not a redox reaction

Produces KCl + H2SO4—> KHSO4 + HCl

A- Level Chemistry (13 decks)

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