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A-LEVEL CHEMISTRY > B1 Moles, Formulae + Equations > Flashcards

B1 Moles, Formulae + Equations Flashcards

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1
Q

Charge of group 1 ions

A

1+

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2
Q

Charge of group 2 ions

A

2+

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3
Q

Charge of group 3 ions

A

3+

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4
Q

Charge of group 5 ions

A

3-

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5
Q

Charge of group 6 ions

A

2-

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6
Q

Charge of group 7 ions

A

1-

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7
Q

Formula and charge of nitrate

A
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8
Q

Formula and charge of carbonate

A
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9
Q

Formula and charge of sulfate

A
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10
Q

Formula and charge of hydroxide

A
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11
Q

Formula and charge of ammonium

A
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12
Q

Formula and charge of zinc

A
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13
Q

Formula and charge of silver

A
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14
Q

How to write ionic equations

A
  • Write balanced symbol equation
  • Aqueous compounds split, solid remain unchanged
  • Remove spectator ions
  • Cancel down
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15
Q

Define Mole

A

A unit containing 6.02 x10 (23) particles

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16
Q

Define Avagadro’s constant

A

The number of particles per mole

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17
Q

Equation for the mass of one atom, using avagadro’s constant

A
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18
Q

Define Empirical Formula

A

The simplist whole number ratio of atoms of each element present in a compound

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19
Q

Define Molecular Formula

A

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

20
Q

Define Anyhdrous

A

A compound containing no waters of crystallisation

21
Q

Define Hydrated

A

A compound containing waters of crystallisation

22
Q

How to calculate the empirical formula of a compound/waters of crystallisation

A
  • Calculate moles of each substance in the compound
  • Find the simplest whole number ratio
23
Q

Moles equation, with mass

A
24
Q

Moles equation, with volume

A
25
Q

Moles equation, with concentration

A
26
Q

Moles equation, with concentration in grams/dm3

A
27
Q

Ideal Gas Equation

A

PV = nRT

28
Q

What must you always remember when solving a problem using the ideal gas equation

A

Re-arrange the equation as symbols before solving

29
Q

Unit of pressure for ideal gas equation, and how to convert from atmospheres

A
  • Pascals
  • 1atm = x10(5) pa
30
Q

Unit for volume in ideal gas equation, and how to convert from other units

A
  • meteres^3
  • cm = x10(-6)
  • dm = x10(-3)
31
Q

n in ideal gas equation

A

Moles

32
Q

Unit for temperature in ideal gas equation, and how to convert

A
  • Kelvin
  • Celcius to kelvin
  • +273
33
Q

Equation for pecentage yield

A
34
Q

Equation for atom economy

A
35
Q

Equation for percentage uncertainty

A
36
Q

When to multiply uncertainty by 2 when calculating percentage uncertainty

A
  • Titres
  • Mass
  • Temperature
37
Q

What is the only gaseous alkali

A

Ammonia (NH3)

38
Q

Define an acid

A

Releases H+ ions in aqueous solutions

39
Q

Describe the difference between weak and strong acids

A
  • Weak acids partially dissociate H+ ions in aqueous solutions
  • Strong acids partially dissociate H+ ions in aqueous solutions
40
Q

Define an alkali

A

Releases OH- in aqueous solutions

41
Q

Define a salt

A

The metal ion (X+) has replaced the H+ ion

42
Q

How many decimal places should be used in titre volumes

A

2dp

43
Q

Describe how to obtain a crystal sample

A
  • Heat in evaporating basin until crystals start to form around outside
  • Leave to cool and crystallise
  • Filter to obtain solid crystals
  • Dry by dabbing with filter paper
44
Q

What are concordant results

A

Results within 0.1cm(^3) of each other

45
Q

Define Standard Solution

A

A solution of a known concentration

A-LEVEL CHEMISTRY (11 decks)

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