Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry 3 > Transisition Metals > Flashcards

Transisition Metals Flashcards

(56 cards)

Start Studying
1
Q

What colour ppt does Cu2+ form with hydroxide or nh3

A

Pale blue solution to blue ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What colour does fe 2+ when it reacts with a hydroxide or nh3

A

Pale green solution to green ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What colour does fe 3+ go when it reacts with hydroxide or nh3

A

Yellow solution to orange ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What colour does Mn go when it reacts with hydroxide or nh3

A

Pale pink solution to pink ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What colour does cr 3+ go when it reacts with hydroxide or nh3

A

Green solution to grey green ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What forms with [Cu(H2O)6]2+ and excess nh3

A

Reacts further from [Cu(OH)2(H2O)4] to [Cu(NH3)4(H2O)2]

Dark blue ppt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What happens when [cr(h2o)6]3+ reacts with excess NaOH

A

Forms [Cr(OH)6]3-

Dark green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What happens when [cr(h2o)6]3+ reacts with excess nh3

A

Forms [Cr(nh3)6]3+

Purple colour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define transition element

A

D block element
Can form at least 1 stable ion
With an incomplete sub shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the electron configuration of Cr

A

3d5 4s1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the electron configuration of Cu

A

3d10 4s1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why isn’t sc a transition metal

A

Only forms 1 stable ion: Sc3+

But it has an empty d sub shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why isn’t Zn a transition metal

A

Only forms 1 stable ion: Zn2+
Looses both electrons from the 4s
So has a complete d sub shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does Cuso4 catalyse

A

Zn + acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does mno2 catalyse

A

Decomposition of h2o2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does fe catalyse

A

The haver process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Why do transition elements make good catalysts

A

Change ox states easily by gaining or losing electrons from their d orbitals
So the transfer of electrons speeds up the rate of reaction

Good at adsorbing substances onto their surfaces to lower their activation energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the risk of using transition metals as catalysts

A

They are toxic
Cu = liver and kidney damage
Mn = physiatric problems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Define complex ion

A

Metal ion surrounded by coordinately bonded ligands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is a coordinate bond

A

When both electrons in a shared pair come from 1 atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is a ligand

A

Atom/ion/molecule that donates a pair of electrons to a central metal ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the coordination number

A

The number of coordinate bonds attached to the central metal ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a monodentate Ligand

Study These Flashcards
A

One lone pair available for bonding

24
Q

What is a ligand with 2 lone pairs available for bonding

25
What type of isomerism do complex ions show
Cis/trans and optical
26
What shape is cis platin
Square planar
27
How is cis platin an anti cancer drug
Cl are displaced pt bonds to 2 N atoms on the cancer cells dna Blocks the translation and transcription of dna Cell can’t divide Cell dies
28
Why is cis platin bad
Prevents division of normal cells Suppresses immune system increasing risk of infection Kidney damage
29
What type of reaction do complex ions undergo
Ligand substitution
30
What happens when the ligands substitution uses similar size Ligands
Same coord no | Same shape
31
What is the colour change in the reaction and write an equation: Cr(h2o)6]3+ + 6nh3
-> cr(nh3)6]3+ + 6h2o Violet -> purple
32
What happens in ligand substitution when the Lignads are different sizes
Change coord no | Change shape
33
Give the equation and colour change and change in shape of this reaction Cu(H2O)6]2+ + 4cl-
-> cu(Cl)4]2- + 6h20 Pale blue -> yellow Octahedral-> tetrahedral
34
Give the equation and colour change of the reaction: Cu(H2O)6]2+ + 4nh3 Why does nh3 have to be in excess
Cu(nh3)4(H2O)2]2+ + 4h2o Pale blue to deep blue You get a hydroxide ppt
35
How many coordinate bonds does haemoglobin have
6
36
How many lone pairs does the haem group give
4
37
How many lone pairs does the globin group give
1
38
Apart from N what else is bonded to the fe in haemolglobin
H2O
39
What happens to haemoglobin in the lungs
High o2 conc Water replaced by o2 Forms ocyhaemoglobin Transported around the rest of the body
40
Why is CO so dangerous
Co swaps with H2O ans binds to the fe Forms carboxyhaemoglobin Co is a strong ligand and won’t swap back with o2 So o2 isn’t transported around the body
41
How is fe2+ oxidised to fe3+
Acidified KMnO4
42
What is the colour change from fe2+ to fe3+
Pale green -> yellow
43
What is the half equation for KMnO4 as an oxidising agent
MnO4- + 8H+ + 5e- -> Mn2+ + 4H2o
44
What is the half equation of the oxidation of fe2+ to fe3+
Fe2+ -> fe3+ + e-
45
How is fe3+ reduced to fe2+ | What is the colour change
I- ions Yellow -> pale green
46
What is the half equations for the reduction of fe3+ using I-
2I- -> I2 + 2e- Fe3+ + 3- -> Fe2+
47
How is the cr3+ ion in cr(oh)6]3- oxidised to cro4)2- solution
Warm with hydrogen peroxide H202 In alkaline solutions
48
What is the half equations for the intro conversion between cr3+ to cro42-
H2o2 + 2e- -> 2Oh- 2cr(oh)6]3- + 4OH- -> 2Cro4)2- + 8H2o + 6e-
49
What is the eqauition to produce the orange cr2o7)2-
2CrO4)2- + 2H+ -> cr2o7)2- + h29 H+ comes from dilute sulfuric acid
50
How is cr2o7)2- reduced to cr3+ | And what is the colour change
Organe to green Add acidified Zn
51
What are the half equation for the reduction to cr3+ using Zn
Zn -> zn2+ + 2e- Cr2O7)2- + 14H+6e- -> 2Cr3+ + 7h2o
52
How is cu2+ reduced to Cu+ | What is the colour change
I- ions | Pale b,he -> off white ppt
53
What is the eqauition for the reduction of cu2+ to Cu+
2cu2+ + 4i- -> 2cui + i2
54
Why does Cu+ spontaneously disproportionates
It’s unstable
55
What is the reaction of Cu+ disproportionatation
2cu+ -> Cu + cu2+
56
What ode spontaneous disproportion mean
The species oxidises ans reduced itself

Chemistry 3 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions