The oil is non-polar and does not dissolve the color or sugar. This is a ball-and-stick model of citric acid. Citric acid is dissolved in water in oranges, lemons, grapefruit, and other citrus fruits.

Students test the inflated bag as a possible flotation device for a model cell phone made of clay. Students will test smaller amounts of citric acid and baking soda to determine the optimum amounts ...