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Chemistry Unit 3 > d block > Flashcards

d block Flashcards

1
Q

What are transition metals?

A

stable elements with an incomplete d sub level

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2
Q

What are some properties of transition metals?

A

high melting and boiling point, sonorous and malleable

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3
Q

What are the most common oxidation states of chromium?

A

2+ 3+ and 6+

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4
Q

What are the most common oxidation states of manganese?

A

2+ 4+ and 7+

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5
Q

What are the most common oxidation states of iron?

A

2+ and 3+

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6
Q

What are the most common oxidation states of cobalt?

A

2+ and 3+

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7
Q

What are the most common oxidation states of copper?

A

+1 and 2+

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8
Q

What colour is Cr3+ in solution?

A

green

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9
Q

what colour is CrO42- in solution?

A

yellow

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10
Q

what colour is Cr2O7,2- in solution?

A

orange

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11
Q

What colour is MnO4- in solution?

A

Purple

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12
Q

What colour is Co2+ in solution?

A

Pink

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13
Q

What colour is Fe2+ in solution?

A

pale green

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14
Q

What colour is Fe3+ in solution?

A

Brown yellow

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15
Q

How is a complex ion formed?

A

A central metal surrounded by molecules linked by coordinate bonds

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16
Q

What are ligands?

A

Molecules that donate a pair of electrons to a metal ion

17
Q

What colour is [Cu(Cl4)]2- in solution?

A

olive green

18
Q

What colour is [Cu(NH3)4(H2O)2]2+ in solution?

A

royal blue

19
Q

What colour is [Cu(H2O)6]2+ in solution?

A

light blue

20
Q

What colour is [Co(Cl4)]2- in solution?

A

royal blue

21
Q

What colour is [Co(H2O)6]2+ in solution?

A

pink

22
Q

What is a heterogenous catalyst?

A

The reactants and catalyst are in different phases. they form temporary coordinate bonds to fix the reactants and weaken the reactants bonds

23
Q

What is a homogeneous catalyst?

A

The catalyst and reactants are in the same phase

24
Q

What catalyst is used for the hydrogenation of alkanes?

A

Nickel

25
Q

What catalyst is used for the Haber process?

A

Iron

26
Q

What catalyst is used for the contact process?

A

V2O5

27
Q

What catalyst is used for the decomposition of H2O2?

A

MnO2

28
Q

What is the only transition metal ion that dissolves in excess OH-?

A

Chromium

29
Q

What colour is chromium after OH- drops?

A

grey ppt

30
Q

What colour is iron II after OH- drops?

A

dirty green ppt

31
Q

What colour is iron III after OH- drops?

A

red brown ppt

32
Q

What colour is copper II after OH- drops?

A

royal blue ppt

Chemistry Unit 3 (4 decks)

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