7/5/2023 0 Comments Precipitate reaction![]() Avoid contact of the solid with eyes and skin. ![]() SAFETY NOTES: Sodium carbonate may cause skin and serious eye irritation. These same reactants will be used in Lesson 4.1 to study the conservation of mass. Explain that when substances are mixed and a new substance is formed, a chemical reaction has occurred.ĭemonstrate the production of a precipitate using magnesium sulfate (Epsom salt) and sodium carbonate. This solid is a new substance, and it’s called a precipitate. Tell students that sometimes when two liquids are mixed, a solid forms. So far, students have observed a gas produced when certain solids and liquids are mixed. Remind students that they have seen that mixing certain substances can result in a chemical reaction that produces a new substance.
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