LEARN THIS NOW Flashcards
1
Q
Are Nitrates soluble or insoluble?
A
- All soluble
2
Q
Are Chlorides soluble or insoluble?
A
- All soluble
- Except for Lead and Silver
3
Q
Are Sulfates soluble or insoluble?
A
- All soluble
- Except for Barium, Calcium and Lead
4
Q
Are Carbonates soluble or insoluble?
A
- All insoluble
- Except for ammonium, potassium and sodium
5
Q
Are Hydroxides soluble or insoluble?
A
- All Insoluble
- Except for sodium, potassium and ammonium
6
Q
How do we perform a Titration?
A
- Use a pipette to transfer 25cm3 of Alkali into conical flask
- Add 5 drops of phenophaline to alkali in conical flask
- Place on white tile to see colour change easily
- Fill a burette with acid
- Add acid till solution is neutral
- Colour change bright pink –> Colourless
7
Q
How do you perform a filter method?
A
- Take a funnel and filter paper
- Take acid and alkali and mix them together
- Stir till a salt forms
- Pour this through filter paper
- Wash residue with distilled water
- Dry Salt
8
Q
Define Homologous series?
A
- Compounds with simmilar chemical properties and trends in physical properties
- Same general formula
9
Q
What is an isomer?
A
- Same mollecular formula different structual formula
10
Q
What does a catalyst do?
A
- Lowers activation energy
- Without chemically changing
- It provides an alternative pathway
11
Q
What do you need to remember when naming polymers?
A
- Di
- Tri
- Tetra
- e.g Tetrafluroethene
12
Q
What are some problems when disposing of addition polymers?
A
- Unreactive so don’t break down
- Carbon Dioxide released when burnt
- Toxic gases released when burnt
13
Q
When we make ethanol but reating ethene with steam, what conditions are needed?
A
temp 300 degs
pressure 65 atm
catalyst of phosporic acid
14
Q
When maaking ethanol from fermation of glucose, what are the conditions?
A
temp 30 degs
anaerobic
yest enzyme
