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Chemistry Grade 11 > Quantitative Aspects of Chemical Change > Flashcards

Quantitative Aspects of Chemical Change Flashcards

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1
Q

Definition of a mole

A

Unit for the amount of substance

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2
Q

Definition of relative atomic mass

A

Value that compares the mass of one atom of an element with the mass of one atom of Carbon-12

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3
Q

Definition of relative formula mass

A

The sum of the atomic masses of all of the atoms in its formula for an ionic substance

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4
Q

Definition of molecular mass

A

The sum of all of the atomic masses of all of the atoms in its formula for a covalent substance

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5
Q

Definition of molar mass

A

Mass of one mole of a substance

Equal to the molecular mass of a covalent substance and equal to the formula mass of an ionic substance

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6
Q

Unit for number of moles

A

mol

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7
Q

Unit for mass

A

g

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8
Q

Unit for molecular mass

A

g/mol

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9
Q

Unit for number of particles

A

Molecules

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10
Q

Unit for volume

A

dm³

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11
Q

Definition of concentration

A

Number of moles of solute per cubic decimeter of solution

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12
Q

Unit for concentration

A

mol.dm³

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13
Q

Definition of a titration

A

A solution of known concentration (standard solution) is used to find out the concentration of an unknown solution

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14
Q

Definition of empirical formula

A

Simplest whole number ratio of elements in a compound

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15
Q

Steps for a stoichiometric calculation

A
  1. Write a balanced chemical equation
  2. Work out the number of mols of the given substance
  3. Use molar ratios to work out mols of the unknown substance
  4. Determine the mass/volume/concentration of the unknown substance
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16
Q

Definition of limiting reagents

A

The substance that is used up completely in a reaction

17
Q

Definition of percentage purity

A

How much of a sample, by mass, is actually of a specific compound/element

18
Q

Definition of yield

A

How much product is formed / how much you get

19
Q

Definition of Avogadro’s number

A

Amount of particles contained in one mole of a substance

20
Q

Definition of molar gas constant

A

One mole of any gas occupies the same volume at the same temperature and pressure

Chemistry Grade 11 (6 decks)

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