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Y11 Chemistry > 1.9 Chemical Analysis > Flashcards

1.9 Chemical Analysis Flashcards

1
Q

Difference in temps for pure substances and mixtures

A

Pure substances have specific temperatures for melting and boiling

Mixtures have a range of values

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2
Q

What is a formulation

A

A mixture that has been designed as a useful product and is formed by mixing together several different substances ensuring the product has the required properties

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3
Q

What is a mixture

A

Two or more substances mixed together which are usually easy to seperate

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4
Q

Mixtures, Dissolving, Filtrating, Crystilisation

A

Dissolving - The soluble salt dissolves in water
Filtration - The solution which passes through the filter paper
Crystilisation - The process of forming crystals from a solution

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5
Q

Soluble meaning

A

Substance dissolves in water

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6
Q

Insoluble meaning

A

A substance does not dissolve in water

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7
Q

Solute meaning

A

A soluble substance which dissolves

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8
Q

A solvent meaning

A

The liquid in which the solute dissolves

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9
Q

Solution meaning

A

The mixture of the solute dissolved in solvent

Solute + Solvent = Solution

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10
Q

Residue

A

The insoluble solid which remains on the filter paper

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11
Q

What is filtrate

A

The solution which passes through the filter paper

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12
Q

What is Miscible

A

LIquids mix, dissolving into one another

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13
Q

What is immiscible

A

Liquids do not mix

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14
Q

What is simple distillation

A

Seperating a solvent from solution

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15
Q

What is Evaporation

A

The change of state from a liquid to a gas below the boiling point

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16
Q

Condensation meaning

A

The change of state from gas to a liquid

17
Q

Distillate meaning

A

The liquid has been condensed from vapour during distillation

18
Q

How can miscible liquids be mixed if they have different boiling points

A

Fractional Distillation

19
Q

What is Paper chromatography

A

Seperation of mixtures of soluble substances by running a solvent through the mixture on the paper

20
Q

How do you know a dye is soluble during chromatography

A

The more soluble the dye is in the mobile phase the further up the paper it travels

21
Q

Separation techniques for

Insoluble solid and liquid

Soluble solid and the liquid in which it is dissolved

Miscible liquids

Immiscible liquids

Soluble Substances

A

Insoluble solid and liquid - Filtration

Soluble solid and the liquid in which it is dissolved - Crystallisation

Miscible liquids - Fractional distillation

Immiscible liquids - Separating funnel

Soluble Substances - Chromatography

22
Q

Test for water

A

Anhydrous copper (II) sulfate (CuS0₄) is a white powder. Whenever water is added it turns blue

23
Q

Colour of flame

Sodium ion

Potassium ion

Calcium ion

Lithium ion

Copper ion

A

Sodium ion - orange or yellow

Potassium ion - lilac

Calcium ion - brick red

Lithium ion - crimson

Copper ion - green - blue

Y11 Chemistry (8 decks)

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