Conservation of Mass Alka Seltzer Lab

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112 Ratings
Science Lessons That Rock
Grade Levels
7th - 9th
Resource Type
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3 pages
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  1. Resources in this bundle will help you teach students about the states of matter, phase changes, the kinetic theory, and the law of conservation of mass. Be sure to click on the previews of each product to check them out before purchasing. Be sure to follow my TpT store by clicking on the green "fol
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In this lab students will use alka seltzer to understand the law of conservation of mass. I use this lab before I teach the law so students can discover it on their own. This lab worksheet is fully editable.

Materials needed: triple beam balances or electronic scale, graduated cylinder, ziploc bags, plastic cup, water, and alka seltzer tablets. I've also found that denture cleaner tablets work well and show a color change which the kids like.

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Total Pages
3 pages
Answer Key
Teaching Duration
45 minutes
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to see state-specific standards (only available in the US).
Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms. Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.


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