Everything Else Unit 5 Flashcards Preview

X A2 chemistry > Everything Else Unit 5 > Flashcards

Flashcards in Everything Else Unit 5 Deck (22)
Loading flashcards...
1
Q

What is the shape of a molecule with 6 Ligands?

A

Octahedral

2 of them are in, 2 flat 2 out.

2
Q

Properties of transition metal compounds

A

Coloured ions and compounds
Catalytic properties
Forms complex ions

3
Q

Why is heterogeneous better than homo

A

They can be filtered off

Easy to seperate

4
Q

What is the charge of amino acids in solid form?

A

+ and -

5
Q

What happens when you turn nitrobenzene to phenylamine

A

Reduction

6
Q

How do you seperate oil and water ?

A

Add organic solvent and water oil mixture to separating funnel and separate
Distill
Add CaCl2 / NaSO4 to dry it.
Filter

7
Q

Why do Ligands have colour ?

A

Ligands cause d orbitals to split
Same frequency of light is absorbed for that colour
Promotes electron transitions from low to high energy

8
Q

What can a polyamide form from?

A

Diamine with di-carboxylic acid or di- acid chloride

9
Q

Peptide link and OH-

A

The C=O will get a O-

10
Q

What type of reaction is hydrogenation

A

Free radical addition

11
Q

What are the fidel crafts reactions

A

Electrophilic substition

12
Q

How to show a reaction is redox ?

A

State the oxidation numbers of the appropriate elements

13
Q

Why do you use a little solvent with recrystallisation

A

To increase the yield as little remains in solution.

14
Q

Transition elements

A

Form stable ions with an incomplete d-subshell

15
Q

Steam distillation to normal distillation

A

Steam is passed through mixture
The compound volatile in steam will be carried away by steam
This uses lower temperature and prevents decomposition

16
Q

How does hydrogen, iron and manganate ions react with each other?

A

MnO4- + 8H+. + 5Fe 2+. > Mn 2+ 5Fe3+ and 4 water

17
Q

Why is electrophilic substition favoured by benzene?

A

It maintains the delocalised system , that provides the stability of benzene , of the 6 p orbital electrons.

18
Q

How does bromine react with phenol?

A

3Br2 reacts with it to give 3HBr

19
Q

What happens when a peptide link if refluxed with acid?

A

Reacts with water and H+ to give amino acid and something with a NH3+

20
Q

Why do transition metals form good catalysts?

A

They have various oxidation states

They are able to donate and receive electrons

21
Q

What does moving equilibrium to the left mean for cell potential?

A

It goes down

22
Q

Why don’t copper +1 complexes have colour?

A

They have a full d she’ll