Chemical Quantities And Reactions Flashcards

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1
Q

Moles

A

-In chemistry, small particles such as atoms, molecules or ions are counted using moles.
-1 mole = 6.02 x 1023
i.e. a mole of anything is 6.02 x 1023 of
something (atoms, molecules, ions)
6.02 x 1023 is known as Avogadro’s number (2 decimal places)

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2
Q

Molar mass

A

Molar mass is defined as the mass of a compound (g) divided by the amount of substance (mol) i.e. the units are in g/mol.

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3
Q

Equation for concentration

A

N=concentration in litres x volume in litres

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4
Q

Equation for dilutions

A

C1xv2=c2xv2

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5
Q

Equilibrium

A

-occurs when the rate of the forward reaction is equal to the rate of the reverse reaction
-concentration is not changing

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6
Q

Kc equation

A

Products over reactants

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7
Q

Le chateliers principle

A

If a stress is applied to a system in dynamic equilibrium, the system will adjust to relieve that stress.

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8
Q

Dynamic equilibrium

A

If a stress is applied to a system in dynamic equilibrium, the system will adjust to relieve that stress.

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9
Q

What will happen to the equlibrium if there is a decrease in pressure(increased volume )

A

-decrease In pressure favours the side with most moles.equilibrium shifts to the left

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10
Q

What happens to the equilibrium is there is an increase in pressure(decrease volume)

A

Increase in pressure favours the side with fewest molest.Equlibrium swifts to the right

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11
Q

Effect of temperature on equlibrium

A

If forward reaction is exoteric the reverse reaction is endo

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