Imagine a hot summer day. Which cans are floating in the ice water, and which have sunk to the bottom? For this experiment you will need. Fill the aquarium or sink almost to the top with water. Place a can of regular soda into the water. Make sure that no air bubbles are trapped under the can when you place it in the water. Does it sink or float? Repeat the experiment with a can of diet soda. The cans of soda have exactly the same volume, or size. But their density differs due to what is dissolved in the soda.
Objectives Predict, test and explain the relative densities of everyday objects through investigating their interaction with water Materials Per Demo or Group: 1 large clear container of water 1 can of cola 1 can of diet cola 1 plastic bag containing 39 g of sugar 1 plastic bag containing 0. To dissolve all the salt, you need to stir the water rather vigorously, for which you can use the large stirring rod. How consistent is the mass of a particular brand of soda? Place a can of regular soda into the water. But the fact that the can of Coke sinks means it must weigh more than the amount of water it displaces, whereas the can of Diet Coke weighs less. We believe that now, more than ever, the world needs people who care about science. In some cases a 12 ounce can of regular soda will contain over 40 grams of sugar. As a result, a drink sweetened with HFCS requires less sweetener to achieve the desired level of sweetness than a drink sweetened with sucrose. It should float. Density represents the relationship between a substance’s mass and the amount of space it occupies, i.
It therefore consists almost entirely of water and the can’s contents therefore weigh about g. Aspartame exhibits a perceived sweetness of times that of sugar. Also, the mass of the can may vary somewhat the ones I measured were somewhere between 12 and 13 g, and it is also possible that the overall size of the can could vary slightly. Diet sodas, on the other hand, use artificial sweeteners such as aspartame. In terms of density, the density of Diet Coke is roughly 1. If the corresponding volume of water weighs just slightly more than the can does, then if we immerse the can in the tank of water, it floats. Place the regular cola into the water. Actually, if the density of the can plus contents is the slightest bit greater than that of water, the can will sink. Ask the students how this compares with their predictions.