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Friday, July 1, 2011

Experiments with Natasha!!!

 (The third  Experiment when 2 - liquids turn into a solid which is called precipitation reaction )

 On Wednesday, a scientist named Natasha came and showed us 3 experiments about acids and bases. The first experiment was putting a 10 cent coin in lemon juice or vinegar.
Method :
  1. One person from each group came and got a cup of lemon juice or vinegar and a 10 cent coin.
  2. We put it on the table and put the 10 cent coin in.
  3. We watched to see what would happen.
I learnt :
  1. That fruits like lemon, orange and grapefruit are a citric acid.
  2. That lemon cleaned the lemon because lemon is a citric acid and the coin is a base.
Results :
The coin got clean because the lemon juice it is a citric acid and it is sour.



The second experiment was putting magnesium in hydrochloric acid or for short you can call it HCI.

Method :
  1. A different person from each group came up and got a cup of HCI and a small piece of magnesium.
  2. We put the cup on the table and put the magnesium in the cup.
  3. We watched to see what happened.
I learnt :
  1. That it took about 1 minute to start fizzing and bubbling.
  2. About 5 mins later it started dissolving into the HCI.
  3. Later on it was gone.
The magnesium dissolved into the HCI so about 4 mins later it was gone.


The third experiment was a blue liquid and a clear liquid and put them together.
Method :
  1. A different person from each group came and got a cup of clear liquid and put it on the table.
  2. We all waited for Natasha to pour some blue liquid into the cup of the clear liquid.
  3. We waited to see what would happen.
I learnt :
  1. That 2 - liquids make a solid.
Results :
The blue liquid and the clear liquid made a blue and hard solid which is called precipitation reaction.


Note :


The words that are blue are scientific words.


By Atalia :)

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