Crystallisation

Which of the following techniques is used to separate the components of some common mixtures?

• Filtration

• Decantation

• Chromatography

• All of the above

Which technique involves the formation of solid crystals from a solution?

• Filtration

• Decantation

• Crystallisation

• Evaporation

Which technique is used to separate mixtures based on the different rates at which components move through a medium?

• Filtration

• Chromatography

• Decantation

• Distillation

Which technique involves the process of separating a solid from a liquid by passing the mixture through a filter?

• Filtration

• Evaporation

• Distillation

• Crystallisation

Which technique involves the separation of a liquid from a solution by heating and cooling?

• Filtration

• Decantation

• Distillation

• Chromatography

Tags

NGSS.MS-PS1-4

What is crystallisation used to separate?

• A soluble solute from a solvent

• A solvent from an insoluble solute

• A gas from a liquid

• A liquid from a gas

What happens to the solvent during crystallisation?

• It freezes

• It evaporates

• It condenses

• It solidifies

What is left behind after the solvent evaporates in the crystallisation process?

• Gas bubbles

• Liquid droplets

• Solute crystals

• Condensed water

Why do crystals have distinct shapes?

• Because the solvent particles lock into one another like pieces of a jigsaw puzzle.

• Because the solute particles lock into one another like pieces of a jigsaw puzzle.

• Because the solution particles lock into one another like pieces of a jigsaw puzzle.

• Because the salt particles lock into one another like pieces of a jigsaw puzzle.

What happens to a saltwater solution as the solvent evaporates?

• The solution becomes less concentrated.

• The solution becomes more diluted.

• The solution becomes more and more concentrated.

• The solution remains the same.