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1 2.2 Floating Colours Name: ______________ Date: ______________ 1. Read through the Problem Solver “Floating Colours” on page 99 (textbook) and read through the questions on these handouts. 2. What is the question to be answered in this lab? That is, what are you trying to find out? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 3. Summarize in point form, the steps to do for the lab. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 4. Do the lab, while recording your observations below. 5. After you add the 3 drops of food colouring, what did you see happen to the food colouring? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 2 6. What happened after you pushed the drops of food colouring through? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 7. Before the food colouring reached the water, was the mixture that you produced a mechanical mixture? Why or why not? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 8. After the food colouring reached the water, was the mixture a mechanical mixture? Why or why not? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 9. What happened after you added and stirred in the detergent? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 3 Page 99 Communicate Use your notes/textbook pages 94-99 to answer these questions. 1. a) Explain the difference between a mechanical mixture and a solution. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ b) How is a pure substance different from a mechanical mixture or a solution? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 2. Give an example of a mechanical mixture made up of: a) two or more liquids ___________________________________________________________ ___________________________________________________________ b) two or more solids ______________________________________________________________ _____________________________________________________________ c) solids and gases ______________________________________________________________ ______________________________________________________________ d) a liquid and a solid ______________________________________________________________ ______________________________________________________________ 3. Is soda pop a mechanical mixture or a solution? Explain. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________
