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Listed under:  Science  >  Matter  >  Chemical compounds  >  Bases (Alkalis)
Moving Image

Will these metals react in an alkaline solution?

Aluminium, iron and copper are metals. Predict which metal will react when a solution of sodium hydroxide (NaOH) is added to each metal. Sodium Hydroxide is an alkaline solution and in this experiment the pH measures 11.76.

Interactive resource

Mine rescue

Rescue three miners trapped by fire. Select and test gases to find out which gas will put out the fire and which gas the miners can breathe.

Interactive resource

Inter-galactic cook-off

Compete in a televised cookery show. Test different combinations of cooking ingredients. Find five combinations that result in a chemical change such as acid-base reactions.

Interactive resource

pH: what is pH?

Test solutions to find whether they are acidic, basic or neutral. Arrange them in order of acidity. Measure the pH of solutions using universal indicators and a pH meter. Identify mystery liquids by measuring their pH. For example, identify the liquid in a car battery as an acid. Remember, all acids and bases including ...

Interactive resource

pH: noughts and crosses

Use your knowledge of the pH of different substances to play noughts and crosses against another player. Pick a square, then match the pH that appears to the correct substance to claim that square. Use clues on the container labels to make your choice. For example, if ‘pH 2’ appears in the square, selecting vinegar from ...

Teacher resource

Using 'Living with acids and bases' - Teacher idea

This Teacher idea introduces students to acids and bases, explores universal indicators to distinguish solutions and investigates the pH scale. Students undertake practical and theoretical activities focusing on acids and bases that are commonly found in our day-to-day lives. It includes a unit of work developed and trialled ...


Ammonia molecule

This is a colour image of a model of a molecule of ammonia, NH₃. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The ammonia molecule consists of one nitrogen atom (the blue sphere) and three hydrogen atoms (the grey-white spheres).