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In Organic Mistakes On Question Papers > Transition Metals > Flashcards

Transition Metals Flashcards

1
Q

What is a transition metal

A

A metal with a partially filled d subshell (at least one ion)

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2
Q

What is unique about chromium and copper

A

They only have one electron in their 4S sub shell (stability)

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3
Q

What fills and empties first 4s or 3D subshell

A

4s

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4
Q

What d block elements aren’t transition metals

A

Sc3+

Zn 2+

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5
Q

What colour is iron 2+

A

Pale green

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6
Q

What colour is iron 3+

A

Yellow

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7
Q

What colour is chromium 3+

A

Green

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8
Q

What colour is chromium 6+

A

Yellow

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9
Q

What can iron be a catalyst for

A

Harbour cycle

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10
Q

What can candour be a catalyst for

A

Production of sulphur trioxide ( 2S02 +O2-> 2SO3)

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11
Q

What can nickel be used as a catalyst for

A

Hydrogenation of an alkene

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12
Q

Sulpherperaoxide is catalysed by what with starch

A

Iron black to colourless

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13
Q

What is a ligand

A

A molecule that donates a lone pair to form a cordon ate bond

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14
Q

What is the coordination number

A

The amount of coordinate bonds a species can from

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15
Q

Example of a monodentate ligand

A

Water, hydroxide, NH3, Cl-, CN-

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16
Q

Example of bi dentate ligands

A

Diol dicarboxylic di amine amino acid

17
Q

Shape of a central metal ion with 6 bonds

A

Octahedral 90 degrees

18
Q

Shape of a complex with four coordinate bonds

A

109.5 degrees tetrahedral

19
Q

Shape of Pt(NH3)4

A

Square planar 90 degrees

20
Q

Colour of CoCl4

A

Blue

21
Q

Colour of CuCl4

A

Yellow

22
Q

What is a steroisomer

A

Same structural formula but different arrangement of atoms in space

23
Q

What is a cis isomer

A

Same side

24
Q

What is a trans isomer

A

Opposite side

25
Q

When do optical isomers occur

A

When there are two or more bidentate ligands

26
Q

Types of ligand reactions

A

Substitution and precipitation

27
Q

When copper sulphate is dissolved in water what colour does it become

A

Cu(H2O)6 pale blue

28
Q

What happens when Cu(H2O)6 reacts with 4NH3

A

Cu(NH3)4(H2O)2 dark blue

29
Q

How to make copper hydroxide precipitate

A

Add ammonia drop wise until pale blue precipitate CuOH2

30
Q

Reaction of Cu2+ and 2OH-

A

Blue precipitate of copper hydroxide

31
Q

Iron2+ and 2OH-

A

Iron hydroxide green precipitate

Brown at surface as oxidised to 3 hydroxide

32
Q

Fe3+ and hydroxide

A

Forms part iron hydroxide orange precipitate

33
Q

Mn2+ and hydroxide (pale pink)

A

Forms Mn hydroxide light brown precipitate

34
Q

Cr3+ and hydroxide

A

Starts violet -> chromium hydroxide grey green precipitate-> Cr(OH)6 dark green solution

35
Q

When iron and Mn react with ammonia what is formed

A

Hydroxide and NH4

In Organic Mistakes On Question Papers (17 decks)

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