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Science Summer Exams Topic 2 > Chemistry 2 > Flashcards

Chemistry 2 Flashcards

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1
Q

Three states of matter

A

Solid, liquid, gas

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2
Q

Gas

A

Easily squashed, weak forces of attraction between particles, particles far apart, particles move freely in all directions, no fixed shape and no fixed volume

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3
Q

Solid

A

Not easily squashed, volume and shape do not change, particles vibrate in fixed position, strong forces of attraction between particles, particles close together

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4
Q

Liquid

A

Fixed volume, shape can change, particles can move over each other, not easily squashed, particles quite close together

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5
Q

Diffusion

A

The movement of the particles of one substance through another without any external mixing. These particles move faster when they are hotter

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6
Q

Element

A

A substance made of only one type of atom. 118 different elements from which all other substances are made. Elements can’t be split in chemical reactions to simpler substances

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7
Q

Rows in the periodic table

A

Periods

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8
Q

Columns in the periodic table

A

Groups

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9
Q

Compound

A

One individual particle = one molecule (different atoms joined together). OR a substance made of two or more elements that are chemically joined (not just mixed).

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10
Q

Mixture

A

Contains a variety of types of particles - they may be particles of elements and/or particles of compounds mixed together.

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11
Q

Metal properties

A

Malleable/flexible/bends without breaking, shiny/lustrous, high melting point, sonorous/rings when hit, conductor of heat and electricity, ductile/can be drawn out into wires.

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12
Q

Conductor…?

A

Lets energy flow through it

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13
Q

Test for hydrogen

A

Squeaky pop test (zinc+HCI is bubbled through a tube. Bubbles of gas produced in this reaction are collected in an upturned test tube. The water is displaced by the gas.)

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14
Q

Test for carbon dioxide

A

Limewater test

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15
Q

Oxygen test

A

Extinguished splint blown out, put in oxygen and will re-light test.

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16
Q

Chromatography rules

A

Get a glass, a wooden stick, a piece of paper with two holes cut out, three pens, one pencil and water. Draw a line in pencil 1.5cm from the paper bottom. Attach the paper with two lines cut out onto a wooden stick. Make three dots on the pencil line in different colours. Put the dotted paper into the glass (no water). Put water in the glass without touching the paper. Leave the paper and check when the pen dots reach the top.

17
Q

Acids PH

A

0(bad acid) - 7(neutral liquid)

18
Q

Alkalis PH

A

7(neutral liquid) - 14(strong alkali)

19
Q

Flammable hazard

A

Tells people a flammable substance is near. Also found near will be no smoking or naked light signs.

20
Q

Oxidising hazard symbol

A

This tells people that a substance has the ability to cause an exothermic reaction with another chemical. This can result in a fire or explosion. This is why a flame is on this symbol

21
Q

Corrosive hazard symbol

A

This is used to warn people about chemicals that may cause damage to them if they come in contact with it. Around here will he harmful acids. Some will be strong enough to cause a corrosion on metal.

22
Q

Toxic hazard symbol

A

Shows that a substance causes serious health damage, possible death and this is why there is a skull on the symbol.

23
Q

Moderate hazard hazard symbol

A

This shows a hazard of any kind but just not of too much danger. This may also be known as a caution of moderate risk sign.

24
Q

Environmental hazard symbol

A

This will be found near substances with the ability to harm the environment/wildlife.

25
Q

Apparatus for distillation parts

A

Thermometer, distillation flask, condenser, receiving flask.

26
Q

Transparent

A

See-through

27
Q

Dissolve

A

When a substance splits up and mixes with a liquid to make a solution

28
Q

Solution

A

A mixture formed when a substance dissolves in a liquid.

29
Q

Soluable

A

Something that will dissolve in a liquid

30
Q

Insoluable

A

Something that will not dissolve in a liquid

31
Q

Solute

A

The substance that has dissolved in a liquid to make a solution

32
Q

Solvent

A

A liquid in which other substances dissolve

33
Q

Saturated

A

When a solution contains the most solute that will dissolve in the solvent

34
Q

Solubility

A

The amount of substance that dissolves in a given amount of liquid

35
Q

How do you make a neutral liquid

A

By mixing alkali and acid in the right proportion ( the exact same amount)

36
Q

What is a natural indicator that we can make

A

Red cabbage indicator.

37
Q

Universal indicator

A

An indicator to

Science Summer Exams Topic 2 (3 decks)

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