At a Glance


  • STEM
  • Chemistry

Instructional Level

  • College & CEGEP
  • University


  • General Chemistry

Tasks in Workflow

Social Plane(s)

  • Group

Type of Tasks

  • Solving problems
  • Reviewing & assessing peers

Technical Details

Useful Technologies

  • Interactive whiteboards
  • Whiteboards


  • Single class period (< 90 mins)

Instructional Purpose

  • Application & knowledge building


The aim of this activity is to present the concepts of solubility and the skills for writing proper chemical equations in an engaging and memorable way.

The students form groups of two and obtain a card with a compound written on it from the teacher. Each group is then tasked to find another group whose compound will form a precipitate with theirs. Together the group of 4 students write out the chemical equation in various ways (molecular/formula, complete ionic and net ionic equation). Upon completion, students review another group’s work.

Instructional Objectives

  • To better understand solubility and precipitation;
  • To know how to write chemical equations.

Workflow & Materials


Activity Workflow

View on CourseFlow

Contributor's Notes

Carmen Leung

Carmen Leung

Dawson College, Montreal, QC

  • It increases student engagement with the material;
  • It facilitates discussion using the correct terminology;
  • It encourages stronger students to help weaker ones.
  • It can be challenging to keep students on task;
  • The groups finish at different rates.
  • Laminate the cards so they can be reused;
  • Groups that finish the exercise early can either obtain another set of cards, or can be asked to carry out a stoichiometric calculation assuming 100g of each compound in their reaction to determine % yield.

Applied Strategies


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