What Affects the Dissolving Rate of Sugar?
This lab can be done using supplies found at the grocery store. You just need sugar and sugar cubes. Even if you don't have enough beakers, you can use clear plastic cups. In my teacher notes, I explain how you can substitute some items if you are on a tight budget, or are in a low-tech classroom like me!
The lab requires students to predict if sugar will dissolve more quickly if it is stirred when added to water vs not stirring, if it dissolves more quickly as loose sugar or as a sugar cube, and if it dissolves more quickly in hot water than in room temperature water. They will learn what affects the dissolving rate of sugar, and transfer that knowledge to other substances.
Students follow the directions and lab safety to perform each activity and record their data. They are then asked to make a bar graph of the data, and answer some questions designed to make them think about why they got the results they did.
This is also a great lab to use when you want to practice good technique,the scientific method, and safety skills.
All instructions, student question pages, teacher notes about how to use the lab, and answer key are included.
The activity can be done in groups or pairs, and can be finished in 1-2 class periods. Use it when you are learning about liquids and solids, solubility, solutions, and physical changes.