Unit 8 Review - SOLUTIONS

Mixtures are considered to be a ______________ combination of two or more substances.

• physical

• chemical

TRUE OR FALSE: The proportions of substances in a mixture can be varied (may change).

• True

• False

​ (a)   ​ mixtures are evenly mixed throughout, while ​ (b)   mixtures are unevenly mixed, and may have ​ (c)   .

• Homogeneous
• Heterogeneous
• layers

This mixture would be considered...

• Homogeneous

• Heterogeneous

This mixture would be considered...

• Homogeneous

• Heterogeneous

This mixture would be considered...

• Homogeneous

• Heterogeneous

Match the method of separating mixtures to its definition.

• Pouring liquid off top, leaving solid.

• Filtration

• Separation of dissolved salt from water.

• Decanting

• Separation based on particle size.

• Distillation

• Separation based on boiling point.

• Evaporation

Match the diagram of the method of separating mixtures to its name.

• Filtration

• 
• Evaporation

• 
• Decanting

• 
• Distillation

• 

To separate a mixture of saltwater and sand, the first separation technique you should use is ​ (a)   . When pouring the mixture through, the ​ (b)   will get caught in the filter, and the ​ (c)   will pass through. Next, use ​ (d)   to have the ​water leave, leaving only the ​ (e)   behind.

• filtration
• sand
• water and dissolved solute
• evaporation
• salt

Two liquids that mix together are considered...

• miscible

• immiscible