Chemistry Honors – Class 03

Dates

• Period A: Thursday, August 27th
• Period B: Friday, August 28th
• Period F: Friday, August 28th

Class Activity – Chemical and Physical Changes

Procedure

• For each combination of items you should gather the items separately and take them back to your table
• perform each combination separately
• record all observations possible after they are combined – details important
• no need to write complete sentences

Disposal

• all combinations with hydrochloric acid should be dumped in waste beaker
• wash all test tubes with water and return to the box
• extra powders and solids should be thrown into the trash
• wipe all surfaces with water
• spilled acid – neutralize with sodium bicarbonate

Combinations of Substances

• zinc metal (one nugget) in hydrochloric acid (inch)
• sodium bicarbonate (pinch) in hydrochloric acid (inch)
• sodium bicarbonate (pinch) heated
• dextrose (pinch) heated
• salt (pinch) heated
• salt (pinch) in water (inch)

Homework

• finish safety assignments
• finish Class 01 work
• complete notes from this lab
• make sure to bring your lab notebook next class meeting