acid base and salts

12345678910
Across
  1. 4. is a reaction between an acid and a base.
  2. 8. turn blue litmus paper into red colour
  3. 9. turn red litmus paper into blue colour
  4. 10. of magnesia is a basic substance that can neutralise the acid of the stomach.
Down
  1. 1. is a natural indicator which is obtained from lichen.
  2. 2. is used to treat acidic soil.
  3. 3. water is neutral in nature.
  4. 5. is found in many household products, such as window cleaners.
  5. 6. indicators the indicators that occur in nature.
  6. 7. are also called alkaline.