Conservation of Mass

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This activity was designed for blind learners, but all types of learners can participate to learn about conservation of gas. This is one of the classic experiments using baking soda and vinegar. The expansion of a balloon with gas provides a tactile experience as the gas is captured rather than being released into the air. The evidence of conservation of mass is supported by the collection of data, by weighing the masses of the reactants before and after the experiment. Learners with visual impairments and sighted students can also learn that matter is neither created nor destroyed during a chemical change.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$1 - $5 per student

Age Range:
Ages 8 - 14

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per student)

  • Tray
  • Baking soda
  • Vinegar
  • Balloon
  • Funnel
  • Approximately 20 oz. plastic bottle with small neck
  • Talking scale or pan balance
  • Measuring cups


  • Life Sciences
    • Cells
      • Cell Division
  • Physical Sciences
    • Chemistry
      • Chemical Reactions
      • Acids and Bases
    • States of Matter
      • Solids
      • Liquids
      • Gases
      • Changes of Phase


To use this activity, learners need to:

  • touch

Learning styles supported:

  • Involves teamwork and communication skills
  • Involves hands-on or lab activities


Components that are part of this resource:

Access Rights:

  • Free access



  • All rights reserved, Perkins School for the Blind,