1. State the objective(s) of the lab. (5 pts)
•To analyze the effects of specific liquids on a variety of materials •To observe potential hazards
•To investigate the effects of strong bases, strong acids, acetone and bleach on a variety of materials which include sugar, cotton, nylon, hair, polystyrene, egg white, egg yolk, and aluminum foil.
2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4Black clumped substance formed
C12H22O11(s) + H2SO4 12C(s) + 11H2O(g)
Cotton + HClNo visible change
Cotton + H2SO4Slight color change (light reddish brown)
Cotton + HNO3No visible change
Nylon + HClCompletely dissolved
Nylon + H2SO4Completely dissolved
Nylon + HNO3Nylon stuck to the bottom of flask
Hair + HNO3Turned hair slightly yellow
Hair + bleachPartially dissolved
Egg white + HNO3Solidified the egg
Egg white + NaOHSolidified the egg
Egg white + bleachCompletely dissolved
Polystyrene + acetoneCompletely dissolved
Aluminum foil + NaOHClumped together to form a hard substance Egg yolk + HNO3Solidified the egg
Egg yolk + NaOHSolidified the egg
Egg yolk + bleachCompletely dissolved
3. What is the correct safety attire for this lab course? (6 pts) Students must wear lab goggles, lab coat, and correct shoes which include no open toes, open backs, or open sides.
4. What is the correct procedure to check out and check in equipment? (6 pts) Students are provided a sheet which indicates the appropriate number of items located in the drawer. Students must count the items and verify they are present in the drawer by filling in the appropriate number by the box and signing the sheet.