acids and bases

 

Properties of acids and bases

  • Get 8 test tubes. Rinse all tubes well with water.  Add acid to four tubes, base to the other four.
  • Touch a drop of base to your finger.  Record the feel in the chart (on the next slide).  Wash your hands with water.  Repeat for acid.
  • Use a stirring rod, add base to the litmus and pH papers (for pH paper use a colour key to find a number). Record results. Repeat for acid.
  • Into the four base tubes add: a) two drops of phenolphthalein, b) 2 drops of bromothymol, c) a piece of Mg, d) a small scoop of baking soda.  Record results. Repeat for acid.
  • Clean up (wash tubes, pH/litmus paper in trash).

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