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Atoms And Reactiolsn Flashcards

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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
Concentration and volume solution to find mol
N=c X v (dm^3) | 1000
26
Finding mols with the ideal gas equation
``` PV = nRT P= pressure V= volume N=moles R= ideal gas constant t= temperature ```
27
Volume conversion
M^3 x1000 dm^3 x 1000 cm^3
28
Temperature conversion
K -273 oC
29
Pressure conversion
kpa x1000 pa
30
Ideal gas constant
8.314 jk-1 mol-1
31
Hydrogen carbonate and its charge
Hco3 -
32
What is lithium and it's charge
li+
33
What is iodine and it's charge
I -
34
What is fluoride and it's charge
F-
35
What are negative ions called
Anions
36
What's iron (iii) and it's charge
Fe 3+
37
What is nitrate and it's charge
No3 -
38
What is barium and it's charge
Ba 2+
39
What's oxide and it's charge
02 -
40
Calcium and it's charge
Ca2+
41
Hydrogen and it's charge
H+
42
What is solider and it's charge
Ag+
43
What is aluminium and its charge
Al 3+
44
Sulphate and it's charge
So 4 2-
45
What is potassium and it's charge
K+
46
What is ammonium and it's charge
NH 4. 3+
47
What is zinc and its charge
Zn 2+
48
Hydroxide and it's charge
OH-
49
Sulphide and it's charge
S2-
50
Chloride and it's charge
Cl-
51
Copper (I) and its charge
Cu2+
52
Sodium and it's charge
Na +
53
Iron (I) and it's charge
Fe 2+
54
Bromide and it's charge
Br -
55
Magnesium and it's charge
My 2+
56
Positive ions
Cations
57
Properties of ideal gas
Random motion Elastic collision Negligible size No intermolecular forces g
58
Why is the mass spectrometer
gives values for percentage abundance of isotopes in a sample of an element
59
How to use mass spectrometer to find mols
Read percentage X by m/z add together 100 diverse by 100 is 1
60
What is percentage yield
Actual | Theoretically X100
61
Atom economy
% atom economy = mr of desired product divided by total mr all product X 100
62
Percentage yield key points on not achieving 100%
Reaction not to completion Other side reactions Purification loss of some
63
Limiting reagent
Not in excess used up first -stopping reaction Calculate each reactant mol and with stoichiometry in the balanced equation
64
Atom economy
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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