Recrystallization Test

Source Institutions

Source Institutions

Add to list Go to activity
In this activity, learners recrystallize substances from solutions and make observations about the resulting crystals. This test can help further identify the unknown. Two different methods for recrystallization are provided in this activity: an overnight method and a 1-hour to 3-hour method. This is a follow-up activity to the "Developing Tests to Distinguish Between Similar-Looking Liquids" activity from the same resource (see related resources). [Activity is publicly available through a web crawler capture on Activity write-up only, images are unavailable.]

Quick Guide

Preparation Time:
10 to 30 minutes

Learning Time:
4 to 24 hours

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

Age Range:
Ages 8 - 14

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • Solutions of salt, sugar, MSG, Epsom salt, and an unknown
  • 5 labeled cups
  • Permanent marker
  • Cotton swabs
  • Student Activity Sheet


  • Mathematics
    • Data Analysis and Probability
      • Data Analysis
  • Physical Sciences
    • Chemistry
      • Solutions
    • States of Matter
      • Solids
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Gathering Data


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Components that are part of this resource:

This resource is part of:

Access Rights:

  • Free access


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


  • All rights reserved, American Chemical Society, 2007