Experiments
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Experiments PowerPoint PPT Presentation


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Experiments. What are some safety rules when doing experiments? What should you do if you burn yourself when using a bunsen burner? Why do we wear safety glasses when doing experiments?. Experiment: Chemical Reactions.

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Experiments

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Experiments

  • What are some safety rules when doing experiments?

  • What should you do if you burn yourself when using a bunsen burner?

  • Why do we wear safety glasses when doing experiments?


Experiment: Chemical Reactions

You will be doing 7 mini experiments. In your book put the heading above. For each of the small experiments put a new subheading.

At each station read and follow the instructions carefully.

In your book write your observations and answer any questions on each work station.


Steel Wool and Copper Sulfate

  • Add 20mL of copper sulfate solution to a beaker.

  • Put a small amount of iron wool into a beaker.

  • What happened to the iron wool, write this description in your book.

  • Is this a physical or chemical change?

  • What are the signs?


Marble Chips and Acid

  • Put 5 small marble chips into 1cm depth of acid in a test tube.

  • Record the reaction.


Carbonate and Vinegar (acid)

  • Vinegar is a weak acid.

  • Dissolve a level teaspoon of bicarbonate of soda in 50mL of water. Is there any reaction taking place?

  • In another beaker add 50mL of white vinegar.

  • Then tip the bicarbonate solution into the beaker with the vinegar.

  • Observe the reaction, is this physical or chemical.


Chalk and Acid

  • Grind a small amount of chalk in a mortar and pestle, use small motions.

  • Measure 50mL of water in a measuring cylinder add this to a beaker.

  • Add this powdered chalk to beaker of water.

  • Is there any reaction taking place?

  • Pour a small amount of acid into a beaker and add some chalk mixture to this.

  • Is there any reaction taking place?


Magnesium and Acid

  • In a test tube add a small amount (5 cm) of hydrochloric acid.

  • Add a small strip of hydrogen to this test tube.

  • Is there a chemical reaction taking place?

  • What are the signs of this? (feel the test tube)


Sodium Sulfate and Barium Chloride

  • On a dropper plate add 3 drops of sodium sulfate and 3 drops of barium chloride.

  • Observe the reaction, what are the signs of the chemical reaction?


Burning Magnesium

  • Light a Bunsen burner using the correct method.

  • Using tongs to hold a small strip of magnesium near the flame.

  • Describe the reaction

  • What are the signs a chemical reaction has taken place.


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