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2 Written questions

2 Multiple choice questions

  1. Water that has certain dissolved ions in it - predominately calcium and magnesium ions
  2. A liquid substance capable of dissolving other substances

2 True/False questions

  1. CohesionThe phemonemon that occurs when individual molecules are so strongly attracted to each other that they tend to stay together, even when exposed to tension

          

  2. ElectrolysisThe use of electricity to break a molecule down into smaller units