C110 - Crystallisation

What is the purpose of adding more solute in the crystallisation process?

• To evaporate the solvent
• To concentrate the solution
• To encourage the formation of crystals
• To dissolve the solute

What is the definition of a crystal?

• A solid material with a random internal pattern of atoms, molecules, or ions.
• A gas material with a repeating internal pattern of atoms, molecules, or ions.
• A liquid material with a repeating internal pattern of atoms, molecules, or ions.
• A solid material with a repeating internal pattern of atoms, molecules, or ions.

How does crystallisation differ from other separation techniques?

• It involves forming crystals
• It involves dissolving a substance
• It involves cooling the solution
• It involves heating the solution

What is the purpose of heating the solution in the crystallisation process?

• To filter the solid crystals
• To encourage the formation of crystals
• To evaporate the solvent
• To dissolve the solute

Tags

NGSS.MS-PS1-4

What is the purpose of evaporating some of the solvent in the crystallisation process?

• To dissolve the solute
• To concentrate the solution
• To encourage the formation of crystals
• To filter the solid crystals

Tags

NGSS.MS-PS1-4

What is the definition of a saturated solution?

• A solution that contains no solute that can be dissolved at a given temperature and pressure, resulting in no solute being able to dissolve.
• A solution that contains a small amount of solute that can be dissolved at a given temperature and pressure, resulting in more solute being able to dissolve.
• A solution that contains the maximum amount of solute that can be dissolved at a given temperature and pressure, resulting in no more solute being able to dissolve.
• A solution that contains a large amount of solute that can be dissolved at a given temperature and pressure, resulting in no more solute being able to dissolve.

Which step in the crystallisation process involves reducing the amount of solvent?

• Stirring the solution
• Concentrating the solution
• Dissolving the solute
• Cooling the solution

What is the purpose of cooling the solution in the crystallisation process?

• To encourage the formation of crystals
• To evaporate the solvent
• To filter the solid crystals
• To dissolve the solute

Tags

NGSS.MS-PS1-4

Which of the following is NOT a characteristic of a soluble substance?

• It can be dissolved in a solvent
• It can be filtered from a solvent
• It can be evenly distributed in a solution
• It can form crystals

What is the definition of a solvent?

• A substance that is capable of evaporating.
• A substance that is capable of forming crystals.
• A substance that is capable of dissolving other substances to form a solution.
• A substance that is capable of filtering.