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Chemistry > Quantitive Chemistry > Flashcards

Quantitive Chemistry Flashcards

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1
Q

Define ‘mole’

A

Mole is the unit for amount of a substance

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2
Q

State Avogadro constant, L,

A

6.02 × 1023 mol-1

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3
Q

Define molar mass

A

Mass per mole of the substance in g mol-1

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4
Q

Define ‘Empirical formula’

A

The simplest whole number ratio of elements in a molecule.

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5
Q

Define ‘Molecular formula’

A

The actual number and type of atom in a molecule

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6
Q

State the formula for Atom economy

A

Atom economy of a reaction
___________________________________________ x100%
sum of the molar masses of all product

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7
Q

State the formula for percentage yield

A

Actual Yield/Theoretical Yield x100

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8
Q

Describe the use of phenolphthalein indicator?

A

Colourless in acid solution
Pale pink when neutralised

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9
Q

Describe the use of methyl orange indicator?

A

Red in acid conditions
Yellow when neutralised
Yellow in alkali

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Chemistry (10 decks)

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