a substance that reacts with an acid to form a compound called a salt.

a soluble base that has a pH of greater than 7.

used to test if a solution is an acid or an alkali.

can react to damage substances or cause chemical burns on skin.

Acids and bases

Science

pH scale and universal indicator solution

Practical: red cabbage indicator solution

Chemical reactions: acid and metal

Metal oxides and non-metal oxides

Chemical reactions: neutralisation

Chemical reactions: acid and metal carbonate

In the unit Making salts, pupils will build on this knowledge to learn about the production of pure salts, and about why acids are acidic and how bases can neutralise them. 

In the Understanding Chemical Reactions unit, pupils learned how atoms rearrange to form new substances during chemical reactions.

This unit covers acids, alkalis, and their neutralisation reactions, the pH scale, and the reactions of acids with metals and alkalis. It also examines the chemical properties of metal and non-metal oxides. Emphasis is on evaluating risks, using appropriate techniques, and making observations.

A scale from 1 to 14 used to measure the acidity or alkalinity of solutions. pH7 is for neutral solutions.

The amount of chemical dissolved in a certain volume of solution.

a solution or paper that will turn different colours depending on pH of the solution.

is a scale from 1 to 14 used to measure the acidity or alkalinity of solutions. pH7 is for neutral solutions.

are tools used to crush and grind substances. The pestle is a grinding club and the mortar a heavy bowl.

is a chemical that will change colour to indicate the presence of a substance, for example if a solution is an acid or alkali.

formed when a substance dissolves into a liquid.

when bubbles of gas are produced in a liquid; another way of saying a liquid is fizzing

when a metal reduces in size due to a chemical reaction

when a chemical reaction is carried out to determine the presence of a substance

a compound comprising of a metal and a non-metal

consists of metal atoms bonded to oxygen atoms.

when a reactant is present in a greater amount than is necessary to completely react.

consists of non-metal atoms bonded to oxygen atoms.

When a chemical reaction takes place between an acid and base to produce a neutral solution of a metal salt and water.

A compound formed when an acid reacts with a base.

Formed when a substance is dissolved in water.

when rocks are broken down by a chemical change, for example reactions with acid rain

a colourless solution which is used to test for carbon dioxide. It turns cloudy/milky white when carbon dioxide is bubbled through it

rainwater that is more acidic than usual due to air pollution, usually caused by sulfur dioxide and nitrogen oxides

Acids and bases

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