Refresh, Set, & AssessQuestions & Lesson Guide for

Solutions Demonstration

Refresh – Answer this

Review Question in your science

notebook

Which of the following statements about the motion of the squirrel is true?

A The squirrel moved with the greatest speed between 0 s and 5 s.

B The squirrel moved with the greatest speed between 8 s and 10 s.

C The squirrel moved with a constant speed between 0 s and 8 s.

D The squirrel moved with a constant speed between 5 s and 10 s.

Set – Get ready for today’s learning activity

• Explain why

saltwater is a mixturemixture and NOT a compound.

Hint: Look back at your notes from the PowerPoint.

Set – Get ready for today’s learning activity

Answer:

• Salt (NaCl) is a compound.

• Water (H20) is a compound.

• Salt + Water = saltwater NOT a new substance!

• Salt & water can be physically separated by distillation.

Solute• in a solution,

the substance that dissolves in the solvent.

–Kool-aid drink mix (powder)

–Sugar

Solvent

• in a solution, the substance in which the solute dissolves.

•water

Dissolve• When the solute disappears

and is absorbed into the solvent.

• Stirring helps the solute to dissolve.

Solution• A mixture of 2 or more

substances uniformly dispersed throughout a single phase.

• The Kool-aid drink is a solution when mixed.

Concentrated• The amount of a particular

substance in a given quantity of a mixture.

• When Kool-aid powder was dissolved in a glass of water it was more concentrated than when it was mixed.

Diluted• .

• When more water was added to the solution, it became more diluted.

Homogeneous• a mixture that has the same

uniform appearance & composition throughout.

• When the sugar & Kool-aid are dissolved completely, the solute is evenly spread out throughout the mixture.

Heterogeneous• a mixture that visibly has different

substances or phases.

• When ice was added a solid was visible in the liquid and the mixture was not the same throughout.

Assess – How much did you learn?

• What was the solute in the demonstration?

• What was the solvent in the demonstration?

• What helped the solute to dissolve?

• Would you like to sample the solution?