Introduction to Reaction Rates – Acivity Part 1 – Surface area Define surface area – 1. Fill both beakers with water. 2. Crush ONE antacid tablet using mortar and pestle. 3. Open another antacid tablet, but do not crush – set aside. 4. Once the first antacid tablet is crushed, simultaneously drop the whole antacid into one beaker of water and the crushed antacid into the second beaker of water. Stir both if desired. 5. After one has completely dissolved, dispose of the water solutions (remove any leftover parts of antacid and throw this away – do NOT throw down the sink)! Which one dissolved first? Why do you think this was the case? Part 2 – Temperature What happens to the speed of molecules as the temperature increases? 1. Refill both beakers with water. 2. Turn the hot plate on to about 400 0 and place one beaker on the hot plate. 3. Allow it to warm for about 5 minutes. 4. Remove two antacid tablets from wrapper. Drop into each beaker (cold and hot) one full antacid tablet. Stir if desired. 5. After one has completely dissolved, dispose of the water solutions (remove any leftover parts of antacid and throw this away – do NOT throw down the sink)! Which one dissolved first? Why do you think this was the case?

Introduction To Reaction Rates Activity

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Page 1: Introduction To Reaction Rates Activity

Introduction to Reaction Rates – Acivity

Part 1 – Surface area

Define surface area –

1. Fill both beakers with water.2. Crush ONE antacid tablet using mortar and pestle.3. Open another antacid tablet, but do not crush – set aside.4. Once the first antacid tablet is crushed, simultaneously drop the whole antacid

into one beaker of water and the crushed antacid into the second beaker of water. Stir both if desired.

5. After one has completely dissolved, dispose of the water solutions (remove any leftover parts of antacid and throw this away – do NOT throw down the sink)!

Which one dissolved first? Why do you think this was the case?

Part 2 – Temperature

What happens to the speed of molecules as the temperature increases?

1. Refill both beakers with water.2. Turn the hot plate on to about 4000 and place one beaker on the hot plate.3. Allow it to warm for about 5 minutes.4. Remove two antacid tablets from wrapper. Drop into each beaker (cold and hot)

one full antacid tablet. Stir if desired.5. After one has completely dissolved, dispose of the water solutions (remove any

leftover parts of antacid and throw this away – do NOT throw down the sink)!

Which one dissolved first? Why do you think this was the case?

Part 3 – Concentration

Teacher Demo