Soda And Effects On Teeth

4 Pages 1028 Words

Sweet Tooth


Background:
During the 1970’s, teenagers drank twice as much milk as soda pop. Since then, the statistics have reversed, having a direct relation to tooth decay. Human teeth were not made to withstand that type of daily exposure to soda. Plaque or bacteria, establish an active colony in the mouth then convert sugar in the beverages to acid. This acid is responsible for breaking down tooth enamel and causing cavities.


Purpose:
The purpose of the lab is to determine which pop has the least amount of sugar, therefore decreasing tooth decay. This is done using a hydrometer.

Materials:
Pipette
Metal BBs
Scissors
Permanent marker
Distilled water
Sugar
Stirring Rod
Four 400 mL beakers
Four different kinds of pop (2 liter bottles)

Procedure:

1. Use four 400 mL beakers and fill them with 250 mL of the four different types of pop. Let them sit for a day in order to make sure the pop becomes flat.

2. Fill a 400 mL beaker with 250 mL of distilled water. Obtain a pipette and metal BBs. Cut the tip off the pipette so it is big enough for it to be filled with BBs. Calibrate the hydrometer by adding or removing BBs from the pipette. The hydrometer is accurately calibrated when it floats in the water just above the bottom of the beaker.

3. Once the hydrometer is calibrated take a permanent marker and mark the water line on the pipette. This is the zero percent line. This means that the density or sugar content of the substance in the beaker is zero percent if it is at this line.

4. Add 25g of sugar to the water. This is ten percent of the solution. Stir the sugar in the water until it is completely dissolved. Mark the water line on the pipette and label this the ten percent line. Continue this process adding 25g of sugar each time therefore increasing the sugar content of the solution by ten percent. When finished there should be zero, ten, twenty, and thirty percent markings.

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