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Chemistry A Level > Foundations in Chemistry > Flashcards

Foundations in Chemistry Flashcards

1
Q

What is the definition of anhydrous

A

The compound left after water has been removed from a hydrated compound

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2
Q

What is the definition of Hydrated

A

Compound containing water

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3
Q

What is a mole

A

The amount of substance which contains the same number of particles as there are in 12g of carbon-12

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4
Q

What is a molecular formula

A

States the actual number of atoms of the elements in a single molecule

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5
Q

What is Relative atomic mass

A

mean mass of an atom relative to 1/12th of the mass of one atom of carbon-12

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6
Q

What is relative molecular mass

A

The weighted mean mass of a molecule compared with 1/12th of the mass of an atom of carbon-12

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7
Q

What is relative isotopic mass

A

Mass of an atom of an isotope of the element compared with 1/12 the mass of an atom of C-12, which is taken as exactly 12

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8
Q

What is the water of crystallisation

A

Water molecules which make up part of the crystal structure of a compound

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9
Q

What is structural formula

A

Formula that shows chemical bonds and how the atoms are arranged

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10
Q

What are isotopes

A

atoms of the same element with different numbers of neutrons and masses

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11
Q

What is the charge of nitrate (NO3)

A

3-

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12
Q

What is the charge of sulfate (SO4)

A

2-

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13
Q

What is the charge of carbonate (CO3)

A

2-

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14
Q

What is the charge of hydroxide (OH)

A

-

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15
Q

What is the charge of ammonium (NH4)

A

+

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16
Q

Percentage yield equation

A

Actual yield/theoretical yield

17
Q

Atom Economy equation

A

Mr of desired/Mr of total

18
Q

What are the steps of making a standard solution

A

1) Weigh solute on a weighing boat
- weigh when full then after to calc mass
2) Dissolve solute
- wash solute into a beaker with dissolved water
- make sure it dissolves in distilled water
3) Make it to known volume
- transfer to volumetric flask by washing it in with distilled water
- make it up till bottom of meniscus touches line
4) homogenise
- shake

19
Q

What is the ideal gas equation

20
Q

How do you convert from Celsius to Kelvin

21
Q

What are acids

A

Release H+ in aq solution, proton donors

22
Q

What are bases

A

Proton acceptors that release OH- in aq solutions

23
Q

Acid + Alkali =

A

Salt + H20

24
Q

Acid + Carbonate =

A

Salt + H2O + CO2

25
Q

What is oxidation and reduction

A

Oxidation - Loss of electrons
Reduction - gain of electrons

Chemistry A Level (6 decks)

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