Rate of Dissolution

Which will dissolve faster? Crushed table salt or a cube of table salt. Assume they have an equal mass.

• crushed table salt

• crystal of table salt

Jackson is making dinner and is trying to dissolve salt into a pot of water. The salt is dissolving slowly. What should Jackson do to speed up the rate of dissolving?

• He should put larger salt particles in the water.

• He should heat the water to a higher temperature.

• He should completely stop stirring the pot of water.

• He should slow down the speed he is stirring the pot.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Look at the diagram. In this diagram, the red dots represent

• the solute

• the solvent

• the solution

to spread out evenly in a liquid

• Evaporation

• Dissolve

• Magnetic

• Solute

The rate of dissolving of a solute in a solvent is faster when the solute and solvent are stirred.

• True

• False

What are the 3 factors that affect rate of dissolution (how fast things dissolve)?

• temperature, wind, surface area

• temperature, agitation, surface area

• emotions, attitude, language

• temperature, sound, surface area

How does temperature affect rate of dissolution?

• high (hot) temperature dissolves slowly

• high (hot) temperature dissolves faster

• low (cold) temperature dissolves faster

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How does agitation affect rate of dissolution?

• It does not affect it

• agitation increases the rate of dissolution (dissolves faster)

• agitation decreases the rate of dissolution (dissolves slower)

How does surface area affect rate of dissolution?

• It does NOT affect rate of dissolution

• higher surface area (more little pieces) dissolves faster

• lower surface area (more big pieces) dissolves faster

What is the best definition of rate of dissolution?

• the measure of hotness or coldness

• stirring

• the area of the surface of the solute

• the speed at which a solute dissolves in a solvent to form a solution