Observing Oxidation-Reduction Reactions
In this task, you will carry out several oxidation-reduction reactions to observe the patterns in which combinations of chemicals react or don’t react with each other. Before you begin this task, read these lab safety guidelines. To review how to use a graduated cylinder and an electronic balance, watch these videos about measuring volume and measuring mass.

Estimated time to complete:
Total time: 24 hours
Active time: 1.5 hours



If you’re using an Edmentum lab kit, remove the items that appear in the equipment list. The chemicals are located inside a box within the kit. You’ll also need distilled or tap water and a pen or fine-tip marker for labeling test tubes. If you aren’t using an Edmentum lab kit, please check with your teacher for help.



You’ll need these materials:

volumetric flask
electronic balance
weighing boats (3)
wash bottle with distilled water (tap water is acceptable but may skew experimental results)
test tube rack
test tubes (6)
labeling tape
sandpaper
stirring rod
forceps
apron
goggles
gloves
pen or fine-tip marker
chemicals from kit:
zinc nitrate (about 8 grams)
magnesium nitrate (about 7 grams)
copper(II) nitrate (about 7 grams)
zinc strips (2)
copper strips (2)
magnesium ribbon (40 centimeters)
For more information about each chemical, view the safety data sheets. Click the Product Resources tab followed by Datasheet.

Always work safely:

Keep lids on the chemical bottles at all times, except when you’re actively dispensing from a bottle.
Wear an apron, goggles, and gloves anytime you’re working with chemicals, including during disposal procedures.
Don’t mix chemicals together except as instructed in the laboratory procedure.
If a chemical splashes into your eyes, immediately remove any contact lenses and flush your eyes with running water for at least 15 minutes. Seek medical attention.
The edges of the metal strips might be sharp. Handle them carefully.
Follow these instructions for setting up the equipment for task 1. Then proceed to part A.


Part D
After about 30 minutes, observe the substances in the test tubes again. Record your observations. Include any evidence of a chemical reaction.


Part E
Leave the test tubes for about 24 hours. Then observe the metal strips in the test tubes again. Record your observations. Include any evidence of a chemical reaction.