Across
- 4. The reaction of an acid and a base forming salt and water.Acid + Base → Salt + Water
- 5. A substance that is neither acid acid or alkali, is at pH7.
- 8. A substance which contains hydrogen particles and has a pH lower than 7.
- 9. The elements or compounds produced by a chemical reaction.
- 11. A substance that changes to a different colour in acid and alkali.
Down
- 1. reaction The process by which one or more substances change to produce one or more different substances.
- 2. a substance that contains hydroxide particles
- 3. A solution of calcium hydroxide, used to test for carbon dioxide. Turns from clear to milky white in the presence of carbon dioxide.
- 6. A chemical substance that is present at the start of a chemical reaction.
- 7. The smallest particle of an element; made of electrons, protons, and neutrons.
- 10. A compound made from the neutralisation of an acid with a base.