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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.
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