Chemistry keywords Flashcards

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1
Q

NEUTRAL

A

A liquid with a pH value equal to pH7.

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2
Q

ACID

A

A liquid with a pH value less than pH7.

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3
Q

ALKALI

A

A liquid with a pH value greater than pH7.

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4
Q

ALUMINIUM

A

A very light metal used to make kitchen foil and saucepans.

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5
Q

ATOM

A

The smallest possible part of a element.

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6
Q

BUNSEN BURNER

A

A piece of apparatus that burns gas and is used to heat apparatus.

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7
Q

CHROMATOGRAPHY

A

A way of separating a mixture of coloured dyes or pigments such as found in ink.

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8
Q

COMPOUND

A

The substance formed when two or more elements are chemically combined together. eg HYDROGEN (element) + OXYGEN (element) = WATER

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9
Q

CONDENSE (condensation)

A

This is what happens when a gas turns to a liquid due to being cooled down. For example when steam touches a cold mirror.

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10
Q

COPPER

A

A pink metallic element. It is a very good conductor of heat and electricity. It is the metal that wires are usually made from.

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11
Q

DECOMPOSE (decomposition)

A

The chemical change that takes place when a compound is split apart into two (or more) simpler substances, usually by heating.

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12
Q

DISTILLATION

A

The name of the process used for obtaining the SOLVENT from a SOLUTION. Eg obtaining pure water from sea water.

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13
Q

ELEMENT

A

Chemical substances that contain only one kind of atom. They are listed in the Periodic Table.

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14
Q

EVAPORATION

A

The process for obtaining the solute from a solution by warming the solution and letting the solvent evaporate away.

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15
Q

FILTRATION

A

The process used for separating a SOLID from a LIQUID. Eg removing dirt from water

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16
Q

GRAPHITE

A

A form of carbon. The black substance inside pencils (the pencil lead).

17
Q

IMMISCIBLE

A

Two liquids that will not mix together (like oil and water)

18
Q

INSOLUBLE

A

When a substance cannot dissolve.

19
Q

MALLEABLE

A

A substance that can be hammered into thin sheets. Includes most metals. Good examples are gold, copper or lead.

20
Q

MIXTURE

A

Something that contains at least two substances that can be separated without a chemical reaction taking place.

21
Q

MOLECULE .

A

The particle formed when two or more atoms chemically join together.

22
Q

pH SCALE

A

A scale of numbers (from 1 to 14)which shows how acidic or alkaline a liquid is.

23
Q

REDUCE (reduction)

A

The kind of reaction happens when we remove the oxygen from a compound.

24
Q

RESIDUE

A

The solid remaining in the filter paper after filtering.

25
Q

SOLID

A

A solid is one of the three states of matter (the other two being liquids and gases).

26
Q

SOLUBLE

A

This is how we describe a substance that can be dissolved. Sugar is soluble in water.

27
Q

SOLUTE

A

The solid that has been dissolved when we make a solution.

28
Q

SOLUTION

A

This is the liquid obtained by dissolving one substance in another.

29
Q

STATES OF MATTER

A

SOLID, LIQUID and GAS are known as this.

30
Q

FILTRATE

A

The liquid left behind after filtering.

31
Q

REDUCING AGENT

A

An element good at removing oxygen from a compound. (Eg magnesium)

32
Q

SOLVENT

A

A liquid good at dissolving things

33
Q

OXIDISE

A

A kind of reaction when oxygen comines with another element.