Understanding Borax Crystal Formation P.S. Midterm

What are mineral crystals formed by the evaporation of water called?

• Igneous rocks

• Metamorphic rocks

• Evaporites

• Sedimentary rocks

How does temperature affect the solubility of borax in water?

• Temperature has no effect

• Heating decreases solubility

• Heating increases solubility

• Cooling increases solubility

Tags

NGSS.MS-PS1-4

What is a solution called when it contains more dissolved solute than it normally would at room temperature?

• Saturated

• Supersaturated

• Unsaturated

• Equilibrium

What happens to borax crystals when a supersaturated solution is disturbed?

• They dissolve further

• They precipitate out of the solution

• They remain unchanged

• They evaporate

What term is used in chemistry to describe solids that fall out of solutions?

• Dissolve

• Evaporate

• Precipitate

• Condense

What is the initial size of borax crystals when they first fall out of solution?

• Macroscopic

• Microscopic

• Gigantic

• Atomic

What happens to borax crystals as they grow in size?

• They dissolve back into the solution

• They become buoyant

• They stick together and grow

• They evaporate

What is the state of a solution when the rate of dissolving equals the rate of crystallization?

• Supersaturated

• Saturated

• Equilibrium

• Unsaturated

What role does a craft stem play in the borax crystal formation experiment?

• It dissolves in the solution

• It prevents crystallization

• It provides a surface for crystals to stick to

• It heats the solution

What is the primary process by which borax crystals form in nature?

• Condensation

• Evaporation

• Sublimation

• Freezing