Percent Composition and Gum

Interpreting Data Water soluble sweeteners and flavorings are added to chewing gum. Are these chemicals added as an outside coating or are they mixed throughout the gum  

Materials balance, weighing paper, 250-mL beakers (2), pieces of chewing gum (2), stirring rod, paper towels, window screen (10 cm x 10 cm), scissors, clock or timer 

Unwrap two pieces of chewing gum. Measure the mass of each separately on a piece of weighing paper. Label the weighing papers with the masses to avoid mixing up your data. Record the masses. 

Add 150 mL of cold tap water to a 250-mL beaker. Place one piece of chewing gum in the water and stir for two minutes. 

Remove the gum from the water and pat dry using paper towels. Measure and record the mass of the dried gum. 

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