Brainscape's Knowledge GenomeTM

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


See full index

Bmat Equations > Chemistry > Flashcards

Chemistry Flashcards

1
Q 
Group 7 properties
Reactivity
Melting point
Boiling point 
Electronegativity
A 
Less reactive
High melting point
Higher boiling point
Electronegativity decreases (astract pair of electrons)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Halogen order and colours

A

Fluorine - yellow gas
Chlorine - dense green gas
Bromine- red/brown volatile liquid
Iodine- dark grey crystalline solid or purple vapour

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

What happens when more reactive halogen reacts with a less reactive halogen salt?

A

Ir displaces it

Higher up group displaces

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

What is volatility?

A

How easily a liquid evaporates

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

What is a mixture?

A

When a solid(solute) and a liquid (solvent) are added together and bonds between solvent break and solute mixes with liquid =solution

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

What is a solution?

A

A mixture of solute and solvent that does not separate out

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

What is a solute?

A

Substance being dissolved

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

What is the solvent?

A

The liquid it’s dissolveing into

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

What is soluble?

A

Means it will dissolve

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

What is the solubility?

A

How much it will dissolve

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

Nail varnish solubility in water?

A

Insoluble, attraction between nail varnish molecules is stronger than that between it and water and vice versa

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

Nail varnish in acetone?

A

Soluble (nail varnish remover) stronger atteactoon between nail varnish and acetone

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

How can you remove a metal from an ore?

A

Reduction by carbon (if less reactive)

Electrolysis

Displacement (other metal is more reactive)

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

What is electrophillic addition?

A

Double bond is attacked by electrophiles (positive ions or polar molecules)

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

Conditions for polymerisation?

A

Pressure

Catalyst

Temp and pressure effect polymer formed

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

What is non biodegradable?

A

Won’t rot

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

Alcohols react with sodium?

A

To give alkoxides

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

Uses of alcohols?

A

In cells to dissolve fats etc

Perfume

Clean paint brushes

Fuel

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

Carboxylic acid functional group?

A

COOH

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

Carboxylic acid and carbonate?

A

Co2+ Oate + water

21
Q

Uses of carboxylic acids?

A

Dissolved in water=vinegar

Citrix scud

Soaps and detergents

Prep of esters

Solvent for organic molecules

22
Q

What is hard water?

A

Contains ca 2+ or mg2+

Reacts with soap =scum

When boiled forms scale

Ca good for teeth
Less risk of heart disease

23
Q

What is the difference between temporary and permanent hardness?

A

Temporary = hydrogencarbonate ions

Permanent= calcium sulphate

24
Q

How to remove hardness?

A

Temporary - boiling

Either- exchange columns containing Na+ or H+

25
Q

Flame test for

Lithium
Sodium
Potassium
Calcium
Barium 
Ions
A 
Crimson
Yellow 
Lilac
Red
Green
26
Q

Test for chlorine!

A

Bleaches damp litmus paper (red to white)

27
Q

Test for oxygen?

A

Relighted a glowing splint

28
Q

Test for hydrogen

A

Squeaky pip with lighted splint

29
Q

Test for metal ions?

Results of 
Calcium
Copper ii
Iron ii
Iron iii
Aluminium 
Magnesium
A

NaOH

White
Blue
Green
Brown
White - redesolves in excess
White
30
Q

Test for carbonates

A

Bubbling through lime water

Goes cloudy

31
Q

Test for halides

A

Add nitric acid the silver nitrate

Cl=white

Br=cream

I=yellow

32
Q

Test for sulphate?

A

AddHCl then BaCl2

White precipitate (bariumsulphate)

33
Q

What if metal ions and hydrogen ions present?

A

Metal ions stay in solution and hydrogen forms at negative electrode unless metal is less reactive

34
Q

If OH and halide ions are present?

A

Halide will form, if not there then oxygen will

Positive electrode

35
Q

How to electroplate?

A

Negative electrode is the metal object that wants plating

Positive electrode is pure metal you want it plated with

Metal ions travel to negative electrode
Metal ions leave positive electrode

36
Q

Electroplating silver?3

A

Silver nitrate

37
Q

Electroplating copper?

A

Copper sulphate

38
Q

How to separate insoluble solids?

A

Filtration and crystallisation

39
Q

Ionic compounds properties?

A 
High melting point 
High boiling point 
Carry electric charge when molten 
Dissolve easily 
Carry electric current in solution
40
Q

Alkali metal properties?

A

Shiny when freshly cut but tarnish as they react with oxygen in moist air

Reactivity increases
Higher density
Lower melting point
Lower boiling point

React with water to produce hydrogen gas and hydroxide metal

Form ionic compounds with non metals

41
Q

Halogen properties

A

Decrease in reactivity

Melting and boiling point increase

Electronegativity decreases

React with alkali metals to form salt

Higher up displace lower in ionic

42
Q

Colours of halogens

A

Fluorine= yellow gas (poisonous and v reactive)

Chlorine=dense green gas (fairly reactive and poisonous)

Bromine=red/brown volatile liquid (dense and poisonous)

Iodine=dark grey crystaline solid or purple vapour

43
Q

How to make bleach?

A

Mix sodium hydroxide with chlorine gas

44
Q

Properties of noble gases?

A

Inert

Colourless gas

Boiling point increases

Density increases

45
Q

Uses of argon?

A

Inert atmosphere in filament lamps

Protect metals that are being welded
Inert atmosphere prevents reacting with oxygen

46
Q

Uses of helium?

A

Airships and balloons

Less dense than air so they float

47
Q

What is sand?

A

Silicon dioxide

48
Q

What is mass spectrometry used for?

A

To find the Mr

A molecular ion is made when bombarded with electrons to remove one = highest mass furthest to the right

49
Q

Equation for % mass?

A

Ar x number of atoms/Mr of whole compound

X100

Bmat Equations (4 decks)

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