Today's Agenda
Our Focus Question: What practices are followed to ensure safety in the laboratory?
Goals
- Identify and describe appropriate dress for laboratory investigations.
- Identify safe and unsafe laboratory conditions and behaviors.
- Follow best practices in the handling of chemicals and equipment in order to minimize exposure to chemicals.
Activities
- Bell Ringer
- Pick up your goggles, and report to lab. Let's finish up.
- Listen for timing and clean up instructions at the bell.
- LAB: Physical and Chemical Changes, Part 1
- Safety
- Materials bench and fume hoods
- Starting and stopping for how to demos
- Processing (Here is digital copy of the lab)
- Lab - Part B
- Safety and Demos (during lab)
- How to light a burner
- How to filter a mixture
- How to safely observe the burning of Mg
- How to clean up an acid spill
- Clean-up
- Solids in the trash
- If your test tube has a solid in it that DID NOT dissolve...
- Wash equipment and put away according to the equipment list.
- Wash hands
- Post-lab questions and scoring (20 points)
- Indicate whether each of the following changes was physical or chemical. Tell WHY based on your observations.
- Mixing Fe and S (Teacher demo)
- Mixing sand, NaCl, and water.
- Burning Mg
- Adding HCl acid to
- the product of burning Mg
- Mg
- Heating sucrose
- Mixing sodium hydrogen carbonate and HCl
- Describe how you were able to decide whether an observed property was physical or chemical.
- Explain what criteria will you use to distinguish between a chemical change and a physical change.
- Closure
- Picture
- Notebooks
- Other
Check Google Classroom.
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