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Chemisty > Atoms And Reactiolsn > Flashcards

Atoms And Reactiolsn Flashcards

1
Q

What is a mole

A

Unit of amount of substance

Amount of particles

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2
Q

How many particles does 1 mole contain

A

6.02 x 10^23 - avogardos constant

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3
Q

What’s the unit of mole

A

Moles- mol

No. particles

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4
Q

What is mole symbol

A

N

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5
Q

What is molar mass

A

mass per mole

Equivalent to mr

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6
Q

What is molar mass measured in

A

Mole g mol -1

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7
Q

What is molar gas volume

A

Volume per mole of gas molecules at a started temperature

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8
Q

Why is molar gas volume measures in

A

Dm^3 mol-1

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9
Q

Equations for molar gas volume dm^3

A

N=v(dm^3)

24.0

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10
Q

What is the equation for molar gas volume for cm^3

A

N=v(cm^3)

2400

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11
Q

how is molar gas volume represented

A

Vm

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12
Q

what is empirical formula

A

The simplest whole number ratio of atoms is each element present in the compound

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13
Q

how to work out empirical formula

A

Smallest ratio

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14
Q

What is the molecular formula

A

The number and type is atoms of each element in a molecule

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15
Q

how to work out molecular formula

A

Find empirical
Relative molecular mass divided by MR
Times answer by each substrict answer

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16
Q

What is the relative molecular mass of a compound

A

It is

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17
Q

how do you work out the relative molecular mass of a compound

A

Hi

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18
Q

what is anhydrous

A

Containing no water molecules

Made heating to evaporate

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19
Q

What is hydrated

A

Contains water molecule as part of its structure

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20
Q

What is water of crystallisation

A

Water molecules that are bonded into a crystalline structure of a compound

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21
Q

X is ?

A

the amount of water molecule

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22
Q

How to work out water of crystallisation

A

Empirical formula work out ratio

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23
Q

How to calculate mol using mass

A

Mol = mass / mr

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24
Q

how to work out mol using solution volume and concentration when dm^3

A

N=c X v (dm^3)

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25
Q

Concentration and volume solution to find mol

A

N=c X v (dm^3)

1000

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26
Q

Finding mols with the ideal gas equation

A 
PV = nRT 
P= pressure 
V= volume 
N=moles
R= ideal gas constant 
t= temperature
27
Q

Volume conversion

A

M^3 x1000 dm^3 x 1000 cm^3

28
Q

Temperature conversion

A

K -273 oC

29
Q

Pressure conversion

A

kpa x1000 pa

30
Q

Ideal gas constant

A

8.314 jk-1 mol-1

31
Q

Hydrogen carbonate and its charge

A

Hco3 -

32
Q

What is lithium and it’s charge

A

li+

33
Q

What is iodine and it’s charge

A

I -

34
Q

What is fluoride and it’s charge

A

F-

35
Q

What are negative ions called

A

Anions

36
Q

What’s iron (iii) and it’s charge

A

Fe 3+

37
Q

What is nitrate and it’s charge

A

No3 -

38
Q

What is barium and it’s charge

A

Ba 2+

39
Q

What’s oxide and it’s charge

A

02 -

40
Q

Calcium and it’s charge

A

Ca2+

41
Q

Hydrogen and it’s charge

A

H+

42
Q

What is solider and it’s charge

A

Ag+

43
Q

What is aluminium and its charge

A

Al 3+

44
Q

Sulphate and it’s charge

A

So 4 2-

45
Q

What is potassium and it’s charge

A

K+

46
Q

What is ammonium and it’s charge

A

NH 4. 3+

47
Q

What is zinc and its charge

A

Zn 2+

48
Q

Hydroxide and it’s charge

A

OH-

49
Q

Sulphide and it’s charge

A

S2-

50
Q

Chloride and it’s charge

A

Cl-

51
Q

Copper (I) and its charge

A

Cu2+

52
Q

Sodium and it’s charge

A

Na +

53
Q

Iron (I) and it’s charge

A

Fe 2+

54
Q

Bromide and it’s charge

A

Br -

55
Q

Magnesium and it’s charge

A

My 2+

56
Q

Positive ions

A

Cations

57
Q

Properties of ideal gas

A

Random motion
Elastic collision
Negligible size
No intermolecular forces g

58
Q

Why is the mass spectrometer

A

gives values for percentage abundance of isotopes in a sample of an element

59
Q

How to use mass spectrometer to find mols

A

Read percentage
X by m/z add together 100
diverse by 100 is 1

60
Q

What is percentage yield

A

Actual

Theoretically X100

61
Q

Atom economy

A

% atom economy = mr of desired product divided by total mr all product

X 100

62
Q

Percentage yield key points on not achieving 100%

A

Reaction not to completion
Other side reactions
Purification loss of some

63
Q

Limiting reagent

A

Not in excess used up first -stopping reaction

Calculate each reactant mol and with stoichiometry in the balanced equation

64
Q

Atom economy

A

Reaction with low atom economy are less sustainable

Raw materials low supply need to be used efficiently

Low means more waste - dispose safely no harm

Separating costs money

Chemisty (2 decks)

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