DESCRIPTION:
This demonstration makes iron (III) thiocyanate complexes that are deep red in color, resembling fake blood.
TOPICS COVERED:
– chemical change
– color change
– complex ion reactions
MATERIALS NEEDED:
– 0.1M Fe(NO3)3
– 0.1M KSCN
– disposable pipets
– 50mL beaker
PROCEDURE:
1. Squirt a few milliliters of iron (III) nitrate into the beaker
2. Squirt a few milliliters of potassium thiocyanate into the beaker
SAFETY:
Safety goggles should be worn at all times. Iron containing compounds can stain skin.
REFERENCES:
Shakhashiri, B.Z. Chemical Demonstrations; University of Wisconsin Press: Madison, 1983; Vol. 1, pp 338.
STORY:
Tell students you are going to make fake blood.
This lesson plan‘s topic is the Evidences of Chemical Reactions. Students learn the various evidences, then they get a change to practice identifying them with a hands on activity. Fake Blood is used in the activity portion of this lesson.