Rate of Dissolution

How does agitation help in dissolving a solute more quickly?

• It increases the temperature of the solvent

•  It increases the weight of the solute

• It brings fresh solvent into contact with undissolved solid

• It changes the shape of the solvent

Why does a solute with a larger surface area dissolve faster?

• It has more solute surface area in contact with the solvent

•  It has fewer solute particles in contact with the solvent

• It has a higher temperature compared to other solutes

• It has a different color compared to other solutes

How does cold water affect the speed of dissolving?

• Cold water slows down dissolving.

• Cold water speeds up dissolving.

• Cold water has no effect on dissolving.

• Cold water has no effect on dissolving.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

John has three cups of sugar particles. Cup 1 has large sugar particles, Cup 2 has medium-sized particles, and Cup 3 has small sugar particles. If John pours each cup in water, which cup of sugar particles will dissolve the fastest?

• Cup 1 will dissolve the fastest.

• Cup 2 will dissolve the fastest.

• Cup 3 will dissolve the fastest.

• They will dissolve at the same rate.

Which would dissolve faster?

• stirring sugar and water 30 times per minute

• stirring sugar and water 10 times per minute

Look at the diagram. In this diagram, the blue area represents

• the solute

• the solvent

• the solution

Stirring the solution increases the rate of dissolution (rate of dissolving).

• True

• False

Tags

NGSS.MS-PS2-2

The smaller the particle size the faster the rate of dissolution (rate of dissolving).

• True

• False

Which of the following actions will NOT increase the rate of dissolution (dissolving) for solids?

• Stirring the solution

• Decreasing the temperature

• Increasing the surface area of the

  solute

• Increasing the temperature

Select the 3 properties that affect the rate of dissolving materials

• surface area

• volume

• temperature

• texture

• stirring