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This was an experiment in a grade 5 class to find new acid base indicators.

This was an experiment in a grade 5 class to find new acid base indicators.

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acid base indicators acid base indicators Presentation Transcript

  • OS,KENT EXPERIMENT
    ACID-BASE INDICATOR OF SCIENCE
  • PROBLEM
    We wanted to find out what juice change color when we put acid or base like cabbage juice.
  • HYPOTHESIS
    • We thought dark colored vegetables would change the colour of water when boiled because cabbage is dark colored, which is an acid-base indicator.
  • MATERIALS
    Pot, bottles, baking soda (the base), vinegar (the acid), wine, rose flower, white rice, black rice, carrot, spinach, black bean, red bean, water and gas burner.
  • METHOD
    1. Put the water in the pot.
    2. Put the material in the pot.
    3. Boil (each item separately).
    4. Put the boiled juice in a separate container.
    5. Divide each container in half.
    6. Put vinegar and baking soda ineach bottle.
  • OBSERVATIONS
  • It didn’t
    change
    it’s color.
    It stayed
    the
    same!!!
  • It didn’t
    change
    it’s color –
    same
    result as
    carrot
    juice.
  • It made a big
    change.
    First, it was
    brown,
    then it
    changed
    to red
    when we added
    The acid (vinegar)
    And then
    it changed to
    green when
    we added the
    base
    (baking soda).
  • It made a big
    change like
    the rose juice.
    First, It
    was dark purple,
    and then it
    changed
    into purple
    when we added
    theacid and
    it changed to
    dark green
    when we added
    the base.
  • It made a little
    change..
    First, It
    was light brown
    (like rose juice),
    and then it
    changed
    into orangey red
    when we added
    the acid and
    it changed to
    brownish green
    when we added
    the base.
  • It was also a good
    acid-base
    indicator.
    First, It
    was a grapey
    color (like black
    bean), then it
    changed Into
    cherry red when
    we added acid and
    it changed to
    super dark
    green when we
    added the base.
  • This was
    totally
    not an
    acid-base
    indicator.
    It didn’t
    change
    color!!!!!
  • It didn’t
    change
    color but,
    it changed
    it’s
    brightness.
    (acid made
    bright color
    and base
    made dark
    color
    like cola !)
  • REFLECTION
    Next time we want to check the temperature of the water we boil. We will also be careful to put the same amount of vinegar and baking soda for each vegetable.
    Next time we will make a better experiment but we learned many things from this experiment – we are just beginner scientists (le~~arners) !!!
  • CONCLUSION 
    From this experiment we learned some other foods that can be used as acid-base indicators.
  • RESEARCH
    We found that most food acid-base indicators contain anthocyanin.
    Wealso found that there are other things that make color change ( like metal ).
  • Other pictures
  • credits
    Bye…
    Wait for the end !
    It’s little bit long but worth the wait - hehe
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