Safely Heating Chemicals with a Bunsen Burner
Learn how to safely heat chemicals using a Bunsen burner through a series of activities including safety precautions, thermal decomposition of copper carbonate, hazard symbol interpretation, and a practical demonstration with step-by-step instructions. Diagrams and explanations provided to enhance understanding and promote safe laboratory practices.
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Presentation Transcript
Heating Chemicals Objective: To be able to heat a chemical safely using a Bunsen burner.
Starter What safety precautions should we take when using Bunsen burners? List 3 in your book
Heating copper carbonate When you heat copper carbonate, it breaks up to form copper oxide and carbon dioxide. What is the word equation for this reaction? + copper carbonate copper oxide carbon dioxide This reaction is called thermal decomposition. Can you explain why? Thermal means heat, and decomposition means breaking into smaller pieces. So in a thermal decomposition reaction, heat is used to break a substance into smaller pieces. forward_arrow_colour
Why is it at an angle? So that the rubber does not burn
Hazard Symbol Copper carbonate has this hazard symbol. What does it mean? Harmful
Heating Copper Carbonate 1) Set up the retort stand and Bunsen as shown by your teacher. 2) Add 2 spatulas of copper carbonate. 3) Light Bunsen and heat on blue flame until you observe the colour change from green to black. 4) Safely turn off Bunsen and allow equipment to cool before packing away.
Diagram Draw a diagram of your equipment and label it. You should include: Test tube Bunsen burner Heat proof mat Retort stand Boss head and clamp
