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Chemistry Y10 > States of matter and mixtures > Flashcards

States of matter and mixtures Flashcards

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1
Q

What does interconversion of state mean

A

When matter changes from one state to another due to changes or temperature

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2
Q

Describe the force between particles in solids

A

Strong forces of attraction

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3
Q

Describe the forces between particles in liquids

A

Weaker attractive forces than solids

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4
Q

Describe the forces between particles in gases

A

Weakest intermolecular force

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5
Q

What is a physical change

A

The forces between the particles change and the particles and chemicals remain the same

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6
Q

What is a chemical change

A

The change affects the chemical properties of the substance

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7
Q

Can physical changes reverse

A

Yes

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8
Q

When a solid turns straight into a gas

A

Sublimation

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9
Q

What is a mixture

A

Contains 2 or more elements or compounds that are not chemically combined

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10
Q

What is a pure substance

A

A single element or compound, not mixed with any other substance

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11
Q

When is simple distillation used

A

To separate a solvent from a solution

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12
Q

When is fractional distillation used

A

To separate a pure liquid from a mixture of liquids

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13
Q

What is fractional distillation

A

Oil is heated until it evaporates, then vapours rise and condense

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14
Q

Describe how to separate an insoluble substance from a solution

A

Place filter paper in a funnel
Pour the solution through
The insoluble substance stays in the funnel

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15
Q

What process can be used to identify substances in a mixture

A

Chromatography

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16
Q

How can chromatography show the composition of a mixture

A

Different colours will separate

17
Q

Why should pencil be used to draw the Line on the paper

A

Because pen will leak in the water too and effect the experiment

18
Q

What is an Rf value

A

The ratio between the distance traveled by the solute and the distance travelled by the solvent

19
Q

How to calculate Rf value

A

Rf = distance traveled by substance/ distance travelled by solvent

20
Q

How could you separate salt from a mixture of salt and sand

A

Add water and then filter the solution

21
Q

What does potable mean

A

Safe to drink

22
Q

How can waste and groundwater be made portable

A

Sedimentation, filtration

23
Q

How can sea water be made potable

A

Distillation

24
Q

What is deionised water

A

Water that has had metallic ions removed

Chemistry Y10 (2 decks)

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