Separating Mixtures Quiz

What is a mixture?

• Two or more substances physically combined without chemical bonds

• Two or more substances chemically bonded

• A single substance with uniform properties

• A substance that cannot be separated into simpler substances

What is the purpose of folding filter paper into a cone shape?

• To make it easier to store

• To fit it neatly inside a filter funnel

• To increase its surface area

• To make it more absorbent

What is the term used for the substance that remains in the filter paper after filtration?

• Solution

• Filtrate

• Solvent

• Residue

Why can't sand grains pass through the filter paper during filtration?

• They dissolve in water

• They are too small

• They react with the filter paper

• They are larger than the pores in the filter paper

Why does filtering not work for separating salt from a saltwater solution?

• Salt particles react with the filter paper

• Salt particles evaporate during filtration

• Salt particles dissolve and pass through the filter paper

• Salt particles are too large

What apparatus is used in the crystallization process to heat the solution?

• A water bath

• A Bunsen burner

• A filter funnel

• A condenser

What happens to the water in the solution during crystallization?

• It evaporates

• It condenses

• It freezes

• It dissolves

Why are crystals larger when water evaporates slowly?

• The solution is stirred continuously

• The temperature is higher

• The crystals have more time to grow

• The solution is more concentrated

What is the final step to ensure crystals are completely dry?

• Pat them dry with filter paper

• Wash them with distilled water

• Leave them in the sun

• Place them in a refrigerator

What is the main difference between filtration and crystallization?

• Filtration separates insoluble solids, crystallization separates soluble solids

• Filtration uses heat, crystallization uses cold

• Filtration is faster than crystallization

• Filtration separates soluble solids, crystallization separates insoluble solids