Acids, Bases and Salts

Flashcards about acids, bases, salts, and states of matter

Corrosive

Can burn the skin

Toxic

Can cause harm by poisoning

Explosive

Can explode

Flammable

Can catch fire easily

Caution

Must be handled with care

Hazard symbol

A symbol used on a chemical to warn of danger.

Acid

A solution with a pH less than 7.

Base

An insoluble alkali, with a pH more than 7.

Alkali

A solution with a pH more than 7.

Indicator

A chemical that can change colour to show whether a substance is an acid, neutral or an alkali.

Neutralisation

The reaction between an alkali and an acid. Also refers to the process of using alkalis to neutralise the effects of acid, for example in indigestion remedies.

Limewater

The chemical used to test for the presence of carbon dioxide - limewater turns from colourless to cloudy

Melting

The process during which a solid changes into a liquid.

Boiling/Evaporation

The process during which a liquid changes into a gas.

Freezing

The process during which a liquid changes into a solid.

Condensing

The process during which a gas turns into a liquid.

Sublimation

The process during which gases change directly into solids or solids change directly into gases.