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7 Science > Chemistry - Mixtures > Flashcards

Chemistry - Mixtures Flashcards

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1
Q

Define MIXTURE

A

Mixture -containing two or more substances

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2
Q

What are the 3 KINDS of MIXTURE?

A

Three different kinds of mixture:

  • Suspension
  • Colloid
  • Solution
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3
Q

Define SUSPENSION

A

Suspension -the substances are not chemically bonded: they will separate over time

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4
Q

Define COLLOID

A

Colloid -the substances are chemically bonded: they are now one substance, and can not be separated easily

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5
Q

Define SOLUTION

A

Solution -the solute is dissolved in the solvent

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6
Q

Define SOLUTE

A

Solute -the solid

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7
Q

Define SOLVENT

A

Solvent -the liquid

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8
Q

If the SOLUTE is SOLUABLE…

A

a SOLUTION is FORMED.

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9
Q

If the SOLUTE is INSOLUABLE…

A

a SUSPENSION is FORMED.

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10
Q

How do you WORK OUT the MASS of the SOLUTION?

A

Mass of SOLUTION = Mass of SOLUTE + Mass of SOLVENT

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11
Q

What does the LAW OF CONSERVATION OF MASS STATE?

A

You will always end up with the same amount of mass that you started with.

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12
Q

What are the 4 METHODS of SEPARTATING MIXURES?

A
  • Filtration
  • Evaporation
  • Distillation
  • Chromatography
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13
Q

What is FILTERING used to SEPARTE?

A

Insoluble solids from a suspension -e.g. sand mixed into water

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14
Q

What is EVAPORATION used to SEPARATE?

A

Soluble solids from a solution/colloid -e.g. salt dissolved in water

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15
Q

What is DISTILLATION used to SEPARTE?

A

Liquid from a mixture -e.g. alcohol from watered alcohol

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16
Q

What is CHROMATOGRAPHY used for?

A

Identifying individual soluble substances in a mixture -e.g. dyes found in ink

17
Q

What are the 2 WAYS to CHANGE STATE?

A
  • Heating

- Cooling

18
Q

What are 2 WAYS of HEATING

A
  • Melting

- Boiling

19
Q

What are 2 WAYS of COOLING

A
  • Condensing

- Freezing

20
Q

What CHANGE of STATE is MELTING?

A

Solid to Liquid

21
Q

What CHANGE of STATE is BOILING?

A

Liquid to Gas

22
Q

What CHANGE of STATE is CONSENSING?

A

Gas to Liquid

23
Q

What CHANGE of STATE is FREEZING?

A

Liquid to Solid

24
Q

What HAPPENS in BOILING?

A

Evaporation

25
Q

What makes a GOOD METHOD?

A
  • Steps are written in order
  • Each step describes one action
  • Use of imperative verbs (for commands)
  • Use of correct scientific names wherever necessary

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