Chemistry Crossword

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Across
  1. 2. the colour of anhydrous copper sulfate
  2. 3. method of separating solids and liquids using paper
  3. 4. An element that makes a makes a squeaky noise in a test
  4. 6. something with a pH level higher than 7
  5. 9. something with a pH level lower than 7
  6. 11. A gas that makes limewater turn chalky
  7. 13. What is the most common gas in the atmosphere
Down
  1. 1. a substance used to measure the pH of a thing
  2. 2. besides carbon dioxide and a salt, what does acid+carbonate make
  3. 5. method of separating dyes in an ink
  4. 7. another method of measuring the pH of a substance
  5. 8. A green-coloured gas
  6. 10. An object changing from gas to liquid state
  7. 12. method of separating liquids of different boiling points