Mixtures and Solutions

Student Book

Focus Questions
Investigation 1
How can a mixture be separated?
Where does the solid material go when a solution is made?
How can you separate a mixture of dry materials?
Are there materials outdoors that will dissolve?

Investigation 2
What is the process to develop a model of the black box?
How does a drought-stopper system work?
What is the difference between dissolving and melting?

Investigation 3
Are all solutions made with soft-drink powder and water the same?
How can you determine which salt solution is more concentrated?
How can you determine the relative concentrations of three mystery solutions?
What is the relationship between salt-solution concentration and density?

Investigation 4
Is there a limit to the amount of salt that will dissolve in 50 mL of water?
Does it always take the same amount of solid materials to saturate 50 mL of water?
What is the identity of the mystery substance?
What is in our water sample?
What is a design to remove salt from ocean water?