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16 Cards in this Set
- Front
- Back
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Condensation
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A physical change from a gas to a liquid
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Evaporation
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A physical change from a liquid to a gas
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Reactants
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Substances that react together to form new substances (called products).
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Products
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New substances formed after a chemical reaction has occurred.
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Rust
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The product of a reaction between iron, water and oxygen. Also called iron oxide.
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Catalyst
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A substance that causes an increase in the rate of a reaction (eg. enzymes).
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Acid
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Substance with a ph less than 7 that tastes sour.
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Base
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Substance with a ph greater than 7 that is bitter to taste.
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Alkaline
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A base that can be dissolved in water to produce a liquid with a high pH.
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Physical change
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A change in state such as from solid to liquid (melting) or liquid to solid (freezing).
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Chemical reaction
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A reaction between two or more substances that results in new products being formed.
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Rate of reaction
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The speed at which new products are formed when two or more substances react together
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Galvanising
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A coating of zinc on iron that reduces the chance of rusting because the zinc corrodes first.
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Combustion
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When carbon compounds (gas, petrol, oil, paper or wood for example) burn with oxygen to produce water and carbon dioxide.
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Neutralisation
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When an acid and a base react to form a salt and water.
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Antacid
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A substance that reacts with an acid to reduce the pH - Alka seltza for example.
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