Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > A2: Transition Metals > Flashcards

A2: Transition Metals Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

Define “Complex Ion”

A
  • central metal ion

* surrounded by CO-ORDINATELY BONDED LIGANDS

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

Define “Co-ordination Number”

A

the NUMBER of CO-ORDINATE bonds formed to a Central Metal I🍩N

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

Define “Ligand”

A

an ATOM, ION or MOLECULE that can DONATE 🐮 a LONE electron PAIR

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

3 characteristics of Transition Metals:

A
  • 🐱 Catalysis
  • VOS Variable Oxidation States
  • C🔴L🔵URED I⚫️NS
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why are Transition Metal Ions usually coloured?

A
  • ONE C🔴L🔴UR of LIGHT 🔦 is ABSORBED to EXCITE 🙈🙉 the electron
  • remaining C🔵L🔵UR is TRANSMITTED through the SOLUTION
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name of ligand that can form 2 co-ordinate bonds and example?

A
  • bidenTate

* NH2CH2CH2NH2

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

Define “Transition Metal”

A

partially filled

🍆D

shell 🐚

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

One feature of SILVER Chemistry that is NOT a feature of Transition Metals:

A

colourLESS ⚪️

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

Give an example of a MULTIDENTATE ligand:

A

EDTA 4-

elizabeth
dona
tames
alan

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

Alternative analytical method for determining the concentration of a solution?

A

ATOMIC

ABSORPTION

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

Electronic Config. of Copper Atom (29 electrons)

A

1s2, 2s2, 2p6, 3s2, 3p6

3d10, 4s1

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

Electronic Configurations for Transition Metals

2 rules

A

When filling up: always 4s1 then 3d…

When removing, always remove everything from 4s shell first

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

Define “Bi-dentate”

A

forms 2⃣ co-ordinate bonds 💗

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

Example of a LINEAR complex formed by a transition metal:

A

● [AgCl2] -

● [Ag (NH3)2]+

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

Formula for Tollen’s and what does it do?

A
  • [Ag(NH3)2]+

* used to distinguish between aldehydes and ketones

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

Define HETEROgeneous:

A

in a diff. PHASE 💭

17
Q

Why may any impurities in reactants cause problems whilst using Heterogenous Catalysts:

A

might BLOCK 🚫 Active 💃 Sites

18
Q

Define “Autocatalysed”

A

catalyst 🐱 is a reaction PRODUCT

19
Q

why are the complexes different C🔴L🔵URS?

A
  • different LIGAND
  • different D orbital energy
  • different wavelengths of COLOURS of light 🔦 are absorbed by d electrons
  • different wavelengths of COLOURs of 🔦 are REFLECTED
20
Q

Planck Constant’s Equation

A

🔺E = hv

21
Q

Units for “Frequency of Visible Light”

A

Hz

22
Q

Features of Transition Metal Complexes that cause a change in the 🔺E value:

A
  • IDENTITY of ligand
  • IDENTITY of metal
  • CHARGE on the METAL
23
Q

Define “Oxidising Agent”

A

GAINS electrons and gets REDUCED

24
Q

Define “Reducing Agent”

A

DONATES electrons and gets OXIDISED

25
Q

In 🔺E = hv, what do the symbols E and h stand for?

A
  • E = energy absorbed by electron

- h = Planck’s constant

26
Q

Physical properties of transition metals?

A
  • High density
  • High BP and MP
  • Ionic Radius more or less the same
27
Q

Why is acid added to the REDUCING agent in redox TITRATIONS?

A

to make sure there are plenty of H+ ions to allow all the oxidising agent to be REDUCED

28
Q

What are the two main OXIDISING agents used in redox titrations?

A
  • MnO4-1 (purple)

- Cr2O72- (orange)

29
Q

Why do Transition metals make good catalysts?

A
  • they have VARIABLE OXIDATION STATES
  • meaning they can TRANSFER electrons
  • to SPEED up reactions
30
Q

The Contact process is used to make….?

A

SULFURIC ACID

31
Q

Write an equation for the Contact Process:

A

S02(g) + 1/2 O2(g) (V205 catalyst (s)—> SO3

32
Q

List 3 HETEROgeneous Catalysts and their uses:

A
  1. Iron (s) (Haber Process)
  2. V205 (s) (Contact Process)
  3. Cr203 (s) Manufacture of METHANOL from Carbon Monoxide and Hydrogen
33
Q

Write an equation for the Haber Process:

A

N2 + 3H2 (Fe catalyst (s)—> 2NH3

34
Q

Write an equation for the manufacture of METHANOL:

A

CO + 2H2 (Cr203 catalyst (s)—> CH3OH

35
Q

Define “Catalyst Poisoning”:

A

IMPURITIES in a reaction mixture may bind to the catalyst’s SURFACE and BLOCK REACTANTS from being ADsorbed - less SA available for reactants so reactions SLOWS down

36
Q

List 2 examples of Catalyst Poisoning

A
  1. LEAD coats the SURFACE of catalyst in CATALYTIC CONVERTERS so vehicles with catalytic converter must only be run on unLEADed petrol
  2. SULFUR poisons the IRON catalyst in the Haber Process (H2 in Haber process comes from METHANE which comes from a NATURAL gas containing IMPURITIES e.g. Sulfur)
37
Q

How can catalyst poisoning be reduced?

A

by PURIFYING the reactants

38
Q

How many humps are present in the ENERGY PROFILE for a HOMOgeneously catalysed reaction and why?

A

2
bcos FIRST: reactants combine with catalyst to make an INTERMEDIATE species
SECOND: the INTERMEDIATE species forms the PRODUCTS and REFORM the catalyst

39
Q

Show how Fe2+ catalyses the reaction between S208 2- and I-

A

S208 2- + 2I- —> I2 + 2S04 2-

Chemistry (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions