Lesson 62: Mixture Separation Unit Test Review Part 1

Multiple Choice

This tool is most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

• distillation

Multiple Choice

This tool is most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

• distillation

Multiple Choice

This tool is most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

Multiple Choice

These tools are most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

• distillation

Multiple Choice

These tools are most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

• distillation

Multiple Choice

A separation funnel can be used to separate...

• Two liquids that are miscible.

• Two liquids that are immiscible.

• Two liquids that have different boiling points.

• Two liquids that have different solubilities.

Multiple Choice

This tool (a fractionating column) is most closely associated with

• filtration

• crystalization

• evaporation

• chromatography

• distillation

Multiple Choice

When using distillation to separate 3 different liquids with different boiling points, which liquid will be removed first?

• methanol

• ethanol

• propanol

Multiple Choice

Fractionating columns help condense prematurely boiling liquids. Which is NOT a reason for this:

• They get colder the higher you go

• They have lots of surface area for condensation to occur

• They filter out the smaller particles

Multiple Choice

TRUE or FALSE: At 66 °C, without a fractionating column, you might get some ethanol contamination in your condensed and collected methanol.

• TRUE

• FALSE

Multiple Choice

If you had salt water and you were trying to extract the salt from it, you would use

• distillation

• evaporation

Multiple Choice

When we separated a mixture of salt and sand in a lab, which technique did we NOT use?

• evaporation

• filtration

• distillation

Multiple Choice

If you had salt water and you were trying to extract and purify the water from it, you would use

• distillation

• evaporation

Multiple Choice

When a solute in solution could be damaged by thermal decomposition, which technique would be better to use?

• evaporation

• filtration

• crystallization

• distillation

Multiple Choice

What term describes how much of a solute can dissolve in a solvent?

• solubility

• density

• boiling point

• immiscible

Multiple Choice

The process for making rock candy and borax crystal ornaments was the same except a different ______ was used.

• separation technique

• solvent

• solute

• heat source

Multiple Choice

The different dyes used to make a marker were separated with chromatography. Which color had the GREATEST Rf value?

• blue

• purple

• red

Multiple Choice

The different dyes used to make a marker were separated with chromatography. Which color had the SMALLEST Rf value?

• blue

• purple

• red

Fill in the Blank

Calculate the Rf value for the blue dye.

Fill in the Blank

Calculate the Rf value for the purple dye.

Fill in the Blank

Calculate the Rf value for the red dye.

Multiple Choice

Which dye is probably the LEAST soluble in the solvent used?

• blue

• purple

• red

Multiple Choice

With a sharpie marker, why did the dot not move on the chromatography paper with a water solvent, but it did move with an alcohol solvent?

• Sharpie dyes are only soluble in water.

• Sharpie dyes are only soluble in alcohol.

Multiple Choice

At 30 °C, how much potassium iodide will dissolve in 100 mL of water?

• 30g

• 90g

• 180g

• 220g

Multiple Choice

At 30 °C, if 40g of potassium iodide are dissolved in 100mL of water, the solution will be

• unsaturated

• saturated

• supersaturated

Multiple Choice

At 30 °C, if 190g of potassium iodide are dissolved in 100mL of water, the solution will be

• unsaturated

• saturated

• supersaturated