Laboratory Introduction: Separating a Mixture

Created Feb. 7, 2024 by Joy Cedarquist


Lab Introduction:  Separating a Mixture

Grade Level:  High School

Subject: Chemistry 1

Duration:  1 class period

DOK Level:  4

SAMR Level: Substitution

Indiana Standard:

  • 11-12.LST.2.3: Follow precisely a complex multistep procedure when carrying out experiments, taking measurements, or performing technical tasks; analyze the specific results based on explanations in the test.
  • 11-12.LST.5.2: Write informative texts, including scientific procedures/ experiments or technical processes that include precise descriptions and conclusions drawn from data and research.  
  • 11-12.LST.7.1: Conduct short as well as sustained research assignments and tasks to answer a question, test a hypothesis, or solve a problem.
  • C.1.1:  Differentiate between pure substances and mixtures based on physical and chemical properties.

Objective:

  • Students will research the physical properties of iron, sand, and salt to figure out how to separate a mixture of the three.
  • Students will write and perform a lab based on the physical properties of the iron, sand, and salt mixture.

Procedure:

  • After splitting students up into groups of 2 or 3, give each group a small dixie cup containing a mixture of iron, sand, and salt.  
  • Instruct them to do some research as to the physical characteristics of the three and write a lab that will result in separation.  
  • They should then perform the lab they have written.
  • Link to previous lesson.
  • Link to next lesson.

Materials:  Have ready for when they request

  • Dixie cup with a mixture of iron, sand, and salt  (Don’t give them too much - it’s not fun to clean up)
  • Magnet
  • Paper to put between the magnet and the sample
  • Filter
  • Filter paper
  • Funnel
  • Evaporating dish and watch glass
  • Something to boil off the water
  • If you have access to it, a suction filtration setup works great.
Return to top