Visualizing Dissolution, Ion Mobility, and Precipitation through a Low-Cost, Rapid-Reaction Activity Introducing Microscale Precipitation Chemistry

Bob Worley, Eric Villa, Jess M. Gunn, Bruce M. Mattson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We describe here an activity that enables students to visualize the dissolution process, ion mobility, and precipitation on a microscale level, all in 30 s. A small puddle of water consisting of approximately 10 drops is placed on a plastic sheet cover. Two small crystals of water-soluble salts are transferred by toothpicks and simultaneously introduced to the puddle from opposite sides. Within 30 s, a precipitate forms where the two ionic solutions meet and the result usually looks somewhat like a cat's eye marble. A significant feature of this activity is that it uses a minimum amount of resources.

Original languageEnglish (US)
Pages (from-to)951-954
Number of pages4
JournalJournal of chemical education
Volume96
Issue number5
DOIs
StatePublished - May 14 2019

Fingerprint

Plastic sheets
Calcium Carbonate
Saline water
Precipitates
Dissolution
chemistry
Ions
Students
water
Crystals
Water
costs
Costs
resources
student

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Education

Cite this

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abstract = "We describe here an activity that enables students to visualize the dissolution process, ion mobility, and precipitation on a microscale level, all in 30 s. A small puddle of water consisting of approximately 10 drops is placed on a plastic sheet cover. Two small crystals of water-soluble salts are transferred by toothpicks and simultaneously introduced to the puddle from opposite sides. Within 30 s, a precipitate forms where the two ionic solutions meet and the result usually looks somewhat like a cat's eye marble. A significant feature of this activity is that it uses a minimum amount of resources.",
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AB - We describe here an activity that enables students to visualize the dissolution process, ion mobility, and precipitation on a microscale level, all in 30 s. A small puddle of water consisting of approximately 10 drops is placed on a plastic sheet cover. Two small crystals of water-soluble salts are transferred by toothpicks and simultaneously introduced to the puddle from opposite sides. Within 30 s, a precipitate forms where the two ionic solutions meet and the result usually looks somewhat like a cat's eye marble. A significant feature of this activity is that it uses a minimum amount of resources.

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