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Calcium chloride pellets (CaCl2) Baking soda, sodium bicarbonate (NaHCO3) Phenol red solution (acid/base indicator solution) Measuring cup or graduated cylinder. 2 plastic teaspoons. Plastic cup. 1-gallon Ziploc-type bag. 2 twist ties or rubber bands. Water Procedures: Day of Activity. Before activity: What the teacher will do: Help clarify ... ................
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