Science; Chemical Reactions

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Balanced Equation
An equation in which the symbols and formulae of the reactants and products are used to model a reaction. Also called a symbol equation, balanced symbol equation or chemical equation.
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Base
A substance that reacts with an acid to neutralise it and produce a salt.
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Bond
The chemical link that holds molecules together.
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Catalyst
A catalyst changes the rate of a chemical reaction without being changed by the reaction itself.
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Endothermic
Reaction in which energy is taken in from the surroundings. The surroundings then have less energy than they started with, so the temperature falls.
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Exothermic
Reaction in which energy is given out to the surroundings.
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Fuel
Material that is used to produce heat, like coal, oil or gas.
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Limewater
Calcium hydroxide solution. It turns milky in the presence of carbon dioxide.
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Neutralise
To be made neutral by removing any acidic or alkaline nature.
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Product
A substance formed in a chemical reaction.
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Reactants
Substances present at the start of a chemical reaction.
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Word Equation
An equation in which only the names of the reactants and products are used to model a reaction.
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Other cards in this set

Card 2

Front

A substance that reacts with an acid to neutralise it and produce a salt.

Back

Base

Card 3

Front

The chemical link that holds molecules together.

Back

Preview of the back of card 3

Card 4

Front

A catalyst changes the rate of a chemical reaction without being changed by the reaction itself.

Back

Preview of the back of card 4

Card 5

Front

Reaction in which energy is taken in from the surroundings. The surroundings then have less energy than they started with, so the temperature falls.

Back

Preview of the back of card 5
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