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Using Chemical Change to Identify an Unknown


Source Institutions

    American Chemical Society

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Using Chemical Change to Identify an Unknown

In this activity, learners will develop a method to test five similar-looking powders (baking soda, baking powder, cream of tartar, detergent, and cornstarch) with four test liquids (water, vinegar, iodine solution, red cabbage solution). They will use the characteristic set of reactions for each powder to identify an unknown powder, which is one of the five powders they have tested.

Quick Guide


Preparation Time:
10 to 30 minutes

Learning Time:
45 to 60 minutes

Estimated Materials Cost:
$1 - $5 per group of students

Age Range:
Ages 6 - 14

Resource Types:
Activity, Experiment/Lab Activity

Language:
English

Materials List (per group of students)


Subjects


  • Physical Sciences
    • Chemistry
      • Chemical Reactions
      • Acids and Bases
  • The Nature of Science
    • The Scientific Process
      • Asking Questions
      • Conducting Investigations
      • Gathering Data
      • Formulating Explanations

Informal Categories


  • Food and Cooking

Audience


To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other


Components that are part of this resource:

This resource is part of:

Access Rights:

  • Free access

By:

  • Kessler, James H.; Galvan, Patricia M.

Rights:

  • All Rights Reserved, American Chemical Society, ©2007

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