Solutions, Colloids and Suspensions—Chemical Demonstration Kit
By: The Flinn Staff
Item #: AP6635
The Solutions, Colloids and Suspensions Chemical Demonstration Kit helps students grasp that when it comes to mixtures, size matters. Students will learn how to easily identify a mixture as one of three types through various applications.
This item can only be shipped to schools, museums and science centers
The size of the particles will determines whether a mixture is a solution, colloid or a suspension. Through a series of four demonstrations, students will see and learn how to easily identify a mixture as one of these three types. Can the particles be collected in a filter? Will they pass through a semipermeable membrane? Do they scatter light? Students will witness these different properties and draw conclusions based on their observations. Teacher Demonstration Notes and reproducible student worksheets are included.
Concepts: Solution, colloid, semipermeable membrane, Tyndall effect. Time Required: 20 minutes Materials Provided: Ammonium hydroxide solution, copper(II) sulfate solution, colloidal starch solution, hydrochloric acid solution, iodine–iodide solution, sodium thiosulfate solution, dialysis tubing and clamps. Note: Perform this demonstration in a fume hood or well-ventilated lab.