Antacid Tablet Race

Lab Jobs Primary Investigator – Read the directions to the lab and keep

everyone on task. Recorder/Reporter – Get everyone a lab sheet & pencil. Safety Inspector/Timer – Get everyone goggles & work the

timer. Materials Manager – Gather these supplies:

2 antacid tablets Two beakers or plastic cups Tweezers or forceps Piece of paper towel Small block of wood Timer (You may use a personal device for this or your PI’s computer.)

Purpose The purpose of this lab is to determine which antacid tablet will

dissolve faster, a whole one or one that has been crushed up.

Hypothesis Which tablet do you think will dissolve faster? Record your hypothesis on your paper.

Step 1 - Fill both beakers about half full with water of the same

temperature.

Step 2 - Wrap paper around one antacid tablet. Place the packet on a

hard surface and crush the tablet by pressing on it with the wood block.

Step 3 - Open the paper packet with the crushed tablet and hold it over

one of the beakers. Pour the powder in the water and time how long it takes for the powder to dissolve.

Record the time on your lab sheet.

Step 4- Pick up a whole tablet and drop it into the second beaker of

water. Time how long it takes to dissolve completely. Record the time on your lab sheet.

Step 5- As a group answer the conclusion questions. CLEAN UP!