The Crystal Growing Rock Chemical Demonstration Kit is an effective and fun way to introduce the topics of crystals, chemical reactions, and the effect of acids on carbonates. Using limestone and acetic acid, crystal growth is examined.
This item can only be shipped to schools, museums and science centers
Amazing! Beautiful popcorn-like crystals actually growing out of a rock. How is this possible? In this demonstration, the teacher performs tests on a limestone rock to determine some of its chemical and physical properties. The rock is then placed in a dish of acetic acid solution and left undisturbed for several days. Watch as puffy crystals slowly appear to sprout from inside the rock! When enough crystals have grown, they are removed and tests are performed. Students record their observations and determine from the data whether the new crystals are the result of a chemical reaction. This demonstration is an effective and fun way to introduce the topics of crystals, chemical reactions and the effect of acids on carbonates. Teacher demonstration notes, along with reproducible student worksheets, are included.Enough materials are included to perform the demonstration seven times.
Concepts: Crystal formation, chemical reactions, properties of acids.
Time Required: 2 class periods, l0 minutes each. Rock crystals grow in about five days.
Materials Provided: Acetic acid solution, chalk, limestone rock, lithium chloride, weighing dishes.
Note: Some common household items and laboratory equipment are required but not provided.