Rate of Dissolving! What did I learn?

Darla put some sugar in a pitcher of iced tea.
 

Why is Darla stirring the iced tea? 

• Stirring makes the iced tea colder
• Stirring makes the sugar dissolve more quickly
• Stirring keeps the sugar from forming into larger pieces
• D - The sugar will not dissolve unless she stirs the iced tea

Rey is making soup. He will dissolve cubes of instant soup mix in hot water.
How can Rey make the soup cubes dissolve more quickly in the water? 

• use less water
• use more water
• add ice cubes to cool the water
• break the soup cubes into smaller pieces

Tags

NGSS.HS-PS1-5

Stirring the solution increases or decreases the solubility?

• increases
• decreases

Stirring the solution increases or decreases the solubility?

• increases
• decreases

Stirring the solution increases or decreases the solubility?

• increases
• decreases

Stirring the solution increases or decreases the solubility?

• increases
• decreases

True or false: The smaller the particle size(large surface area per unit volume) means...

• increase in solubility
• decrease in solubility

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.

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

Tags

NGSS.HS-PS1-5

What combination would dissolve a solid solute the fastest?

• high temperature, no stirring

• no heat, no stirring

• sugar cube, no heat

• high temperature, stirring