This is a great lab to prove the conservation of matter/conservation of mass. It is a very methodical and thorough investigation that helps students complete the lab independently and accurately. The materials needed are readily available (most, if not all, are probably already in your classroom!). Have fun!
Materials needed (per student/group): balloon, alka seltzer tablet, triple-beam balance, flask, water, graduated cylinder (25mL or 50mL), Sodium Bicarbonate (baking soda - 4 grams), acetic acid (vinegar 20mL).
The designed PDF can be enjoyed the way it is, but a straightforward editable word doc is included as well.
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