Chemistry

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Across
  1. 2. A medicine containing an alkali used to cancel out some of the acid in the stomach to treat heat burn
  2. 4. Another word for irritant
  3. 6. Substances that attack metals, stonework and skin are called this
Down
  1. 1. Something made of particles that are very spread out and have no bonds between them
  2. 2. A substance that turns blue, and has a PH level of more than 7
  3. 3. Substance that is not acid or alkali. It has a PH level of 7
  4. 5. A substance that turns red and has a PH of less than 7