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16 Cards in this Set

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