Dissolution Rate

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

• True

• False

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

• True

• False

Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water?

• Smaller crystals increase the surface area and slow down dissolving.

• Smaller crystals decrease the surface area and speed up dissolving.

• Smaller crystals increase the surface area and speed up dissolving.

• Smaller crystals decrease the surface area and slow down dissolving.

What combination would dissolve a solid solute the fastest?

• high temperature, no stirring

• no heat, no stirring

• sugar cube, no heat

• high temperature, stirring

Increase the rate of dissolution by ___.

• Heating it, Crushing it Stirring it

• Heating it, cooling it crushing it

• Stirring it, Crushing it cooling it

• Smelling it, crushing it, stirring it

Calculate the rate of dissolution if 10 grams of a solute dissolves in 200 mL of water in 5 minutes. Express your answer in grams per minute.

• 0.5 grams per minute

• 2 grams per minute

• 1 gram per minute

• 0.2 grams per minute

Tags

DOK Level 3: Strategic Thinking

TEKS.SCI.7.6E

Which factor does NOT affect the rate of dissolution?

• Temperature.

• Surface area.

• Agitation.

• Color of the solute.

Which of the following does NOT affect the rate of dissolution of a solute?

• Time of day

• Temperature

• Surface Area

• Agitation

What are the three factors that can affect the rate of dissolution?

• Temp, surface area, agitation

• Temp, density, and solubility

• Temp, agitation, and volume

• Temp, surface area, and solubility

Which of the following factors affect the rate of dissolution of a solute in an aqueous solution?

• The surface area of the solute

• Temperature

• Color of the solute

• Agitation