Acid/Alkali Key terms FQA

A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals.

• Acid
• Alkali
• Salt
• Compound

A substance that will neutralise an acid, but does not dissolve in water.

• Acid
• Base
• Salt
• Compound

substance with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids.

• Alkali
• Acid
• Salt
• Compound

A measure of acidity or alkalinity of water soluble substances

• H value
• Acid value
• Base value
• pH value

The smallest particle of a chemical element that can exist.

• Compound
• Atom
• Polyatomic ion
• Bond

A thing that is composed of two or more separate element chemically bonded together.

• Atom
• Element
• Compound
• Mixture

A chemical reaction that is accompanied by the absorption of heat

• Exothermic
• Endothermic

A chemical reaction that is accompanied by the release of heat

• Exothermic
• Endothermic

A mixture is made from different substances that are not chemically joined.

• Compound
• Atom
• Mixture
• Bond

The positively charged central core of an atom, consisting of protons and neutrons and containing the vast majority of mass.

• Shell
• Base
• Nucleus
• Orbital