Question Answer
acetic acid The old name for ethanoic acid. It is the acid in vinegar.
acid A substance that turns litmus red. It has a pH of less than 7.
ascorbic acid Chemical name for vitamin C.
citric acid The acid in citrus fruits.
ethanoic acid The acid in vinegar.
gas Something made of particles that are very spread out and have no bonds between them.
sweetener A substance that makes things taste sweeter.
corrosive Substances that attack metals, stonework and skin.
harmful Another word for irritant.
hydrochloric acid A common acid that is also found in your stomach.
irritant Something that irritates the skin and eyes.
nitric acid A common acid.
sulphuric acid A common acid – used in car batteries.
alkali Substance that turns litmus blue. Has a pH of more than 7.
indicator A dye that will change colour in acids and alkalis.
litmus A simple kind of indicator. It turns red in acids and blue in alkalis.
neutral Substance that is not an acid or an alkali. Has a pH of 7.
antacid A medicine containing an alkali used to cancel out some of the acid in the stomach to treat heartburn.
pH scale A numbered scale form 1-14 showing the strengths of acids and alkalis.
universal indicator A mixture of indicators giving a different colour depending on how weak or strong an acid or alkali is.
burette A tube with a tap at the bottom and a measuring scale on its side. Used to add a measured quantity of a liquid to another one.
dilute We dilute a solution by adding more of the solvent to it.
neutralisation When something is neutralised.
neutralise When an acid is added to a base (or alkali) a neutral substance is produced.

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