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Flashcards in Extension Deck (28)
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1
Q

What is qualitative analysis?

A

How much of a particular substance is present

2
Q

What is quantitative analysis?

A

How much of someone is present

3
Q

What is the test for metal hydroxide ions?

A

Add Sodium Hydroxide

4
Q
The colour of each precipitate after sodium hydroxide added:
Calcium
Copper
Aluminium 
Iron 2
Iron 3
A
Calcium: white
Copper: blue
Aluminium: white but goes back
Iron 2: green 
Iron 3: brown
5
Q

Test for halides

A

Add dilute nitric acid then silver nitrate

6
Q

Results of the halide test
Chloride
Bromide
Iodide

A

Chloride: white ppt
Bromide: cream ppt
Iodide: yellow ppt

7
Q

What is the equation to find mass of grams

A

No. of moles x formula mass

8
Q

What is the equation of Mass Concentration g/dm3

A

Mass / volume dm3

9
Q

How do you know if water is hard

A

It will not lather with soap

10
Q

What is hard water caused by

A

Calcium and magnesium ions

11
Q

How can you remove temporary hardness?

A

Boiling

12
Q

How can you remove hardness

A

Ion exchange resin

13
Q

The equation for concentration

A

Moles / volume

14
Q

How do you make a soluble salt

A

Reacting an acid with an insoluble base

Sodium, potassium, ammonium hydroxides

15
Q

What is electrolysis

A

Using electricity to decompose compounds

16
Q

What happens at the anode and cathode

A

Electrons take away at anode

Gained at cathode

17
Q

What is made during the electrolysis of molten sodium chloride

A

Chlorine at anode

Sodium at cathode

18
Q

Results of electrolysis of lead bromide

A

Bromine at anode

Lead at cathode

19
Q

What are the electrodes when copper is used

A

Anode is big lump of impure

Cathode is thin and pure

20
Q

What are the electrodes in electroplating

A

Anode- bar of metal

Cathode- object being electroplated

21
Q

What is Avogadro’s law

A

One mole of any gas occupies 24dm3

22
Q

What is the equation for volume of gas

A

Mass of gas / Mr or gas x 24

23
Q

What is a reversible reaction

A

Products of reaction can react to produce the original reactants

24
Q

What is a dynamic equilibrium

A

Reactions are still taking place in both directions

25
Q

What happens if you raise or lower the temperature in a reversible reaction

A

Raise: favour endothermic to use up heat
Lower: favour exothermic to give out heat

26
Q

What happens if you raise or lower the pressure in a reversible reaction

A

Raise: favour reaction which produces less volume
Lower: favour reaction which produces more volume

27
Q

What is the equation to make ammonia in the haber process

A

N2 + 3H2 ~ 2NH3

28
Q

What is the ideal pressure and temperature for the haber process

A

200 atmospheres

450 c