JCE Online: Journal of Chemical Education: May 1997: Cover


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Home > Journal of Chemical Education > Issues > 1997 > May >

May 1997 Featured on the Cover

May 1997

Table of Contents

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A small portion of the crystal lattice of zeolite A is shown superimposed on a sample of laundry detergent (see Properties of Zeolite A Obtained from Powdered Laundyr Detergent: An Undergraduate Experiment by Smoot and Lindquist). The red spheres represent oxygen atoms and the gray spheres represent either silicon or aluminum atoms. When zeolite A is manufactured, the ratio of aluminum to silicon can be varied. For each aluminum there is a corresponding Na⁺ ion somewhere in one of the open channels visible on the cover. Exchange of these sodium ions for calcium or other ions is responsible for the water-softening ability of zeolite A and hence for its presence in laundry detergents.

The molecular graphic was created by Randy Wildman.

The cover was designed by Betsy True.

Home > Journal of Chemical Education > Issues > 1997 > May > Featured on the Cover

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