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Chemistry Intro
year 9 and 10 science VicCurric
Term | Definition |
---|---|
acid | a substance that produces hydrogen ions when dissolved in water |
alkaline | describes the solution made when a base is dissolved |
anion | a negatively charged ion |
base | a substance that produces hydroxide ions when dissolved in water |
catalyst | a chemical that helps to speed up a chemical reaction but is not used up in the reaction |
cation | a positively charged ion |
caustic | the term used to describe corrosive bases |
chemical potential energy | energy stored in the molecules |
combination reaction | occurs when two reactants combine to form a single product |
combustion | a chemical reaction in which a substance burns in oxygen to give light and heat |
corrosion | a chemical reaction in which a metal reacts with oxygen to produce a metal oxide but does NOT produce significant amounts of heat and light |
decomposition reaction | a chemical reaction in which one reactant breaks apart into two or more products |
endothermic | a physical or chemical process that absorbs energy |
enzyme | a biological catalyst |
exothermic | a physical or chemical process that produces energy in the form of heat or light |
hydrocarbons | all substances made up of just hydrogen and carbon - commonly used as fuels |
incomplete combustion | combustion that occurs in a limited supply of oxygen |
insoluble | does not dissolve |
ion | an atom that has gained or lost electrons to become electrically charged |
ionic compound | a substance made of positive and negative ions |
neutral | neither acidic or basic |
precipitate | the insoluble product of a precipitation reaction |
precipitation reaction | when two clear solutions react to produce an insoluble solid |
product | a substance produced by a chemical reaction |
reactant | the initial substance of a chemical reaction |
respiration | an exothermic chemical reaction between sugar and oxygen inside cells to produce carbon dioxide, water and energy |
salt | an ionic compound formed by the reaction of an acid with another element or compound |
soluble | able to dissolve |