Activity Number 259
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	Overview and Learning Objectives
	Assessment
	Central Concepts
	Benchmarks and Standards
	Activity Credits
	Requirements

Chromatography

Interactive, scaffolded model

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	Overview and Learning Objectives Students learn about the phases of molecular separation, and then experiment with paper and ion chromatography. Students learn about the phases of molecular separation, and then experiment with paper and ion chromatography. Students will be able to: identify the role of the mobile and stationary phases in the separation process; compare paper and ion chromatography; manipulate hydrophobic and hydrophilic characteristics of the mobile and stationary phases in order to compare results. return to top



	Assessment Test http://www.concord.org/~barbara/workbench_web/pdf/Chrom_assess.8.07bt.pdf Rubric http://www.concord.org/~barbara/workbench_web/pdf/Chrom_rubric.8.07bt.pdf return to top



	Central Concepts Key Concept: Chromatography uses differences in weak attractions among molecules to effect molecular separation. Additional Related Concepts Molecular Biology Molecular separation Protein Physics/Chemistry Hydrophobicity Van der Waals Systems Emergent Properties return to top



	Benchmarks and Standards AAAS THE PHYSICAL SETTING: FORCES OF NATURE - Electromagnetic forces acting within and between atoms are vastly stronger than the gravitational forces acting between the atoms (Full Text of Standard) THE PHYSICAL SETTING: FORCES OF NATURE - There are two kinds of charges-positive and negative. (Full Text of Standard) NSES Science as Inquiry: 3 Use technology and mathematics to improve investigations and communications (Full Text of Standard) Science as Inquiry: 6 Communicate and defend a scientific argument (Full Text of Standard) Science as Inquiry: Design and conduct scientific investigations (Full Text of Standard) return to top



	Activity Credits Created by CC Project: Molecular Workbench using Molecular Workbench + Pedagogica return to top



	Requirements Adobe Flash Plugin Java 1.4+ - Java 1.4+ is available for Windows, Linux, and Mac OS X 10.3 and greater. return to top

These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701 and EIA-0219345

Any opinions, findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.

Chromatography

Overview and Learning Objectives

Assessment

Central Concepts

Additional Related Concepts

Benchmarks and Standards

Activity Credits

Requirements