1. Chemical Reactions Mini Experiments

2. Before we begin:  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?  What happens if you are not following the safety precautions in the lab?

3. 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.  For each of your experiments you will use many of your senses to make observations.  In your book write your observations and answer any questions on each work station.

4. 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?

5. Marble Chips and Acid  Put 5 small marble chips into 1cm depth of acid in a test tube.  Record the reaction.

6. 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.

7. 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?

8. 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)

9. 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?

10. 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.

11. Signs of a chemical reaction  In your chemical reaction experiments you will have made many observations.  The changes that occurred are observable signs that a chemical reaction has occurred.  Compile a list of all of the signs of chemical reactions you have encountered today.