Solubility Post Lab Questions

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Solutions
- The Importance of Water
- Types of Solutions
- Solubility and Solubility Rules
- Molarity and Dilutions

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​Announcements:
Review Day Tomorrow

Mini Test Monday

Hypothesis and Why Part 1

• Surface Area

  • increases solubility and dissolution rate of solids

    • ​As particle size decreases, surface area↑ increases, dissolving rate ↑ increases

Hypothesis and Why Part 2

• Temperature for solids and liquids

  • Adding heat to increase the temperature increase solubility and dissolution rat

    • Increasing the temperature causes the atoms/molecules to increase movement and will increase solubility

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Gasses Review

• Temperature for Gasses

  • Adding heat to increase the temperature but decreases the solubility and dissolution rate of gasses

    • Increasing the temperature causes the atoms/molecules to increase movement gas atoms/molecules move further apart preventing mixing.

Multiple Choice

How does increasing the temperature affect solubility and dissolution rate?

• Increases solubility and dissolution

• Decreases solubility and dissolution

Post Lab Questions Part 1

• 1) use the data table

• 2) Ask in part 1 did you apply any of the following factors that affect solubility and dissolution of solids/liquids.

​Agitation
Physically mixing

​Temperature
Increase or decrease temperature

​Surface Area
Change in particle size

Multiple Select

What two factors of solubility were tested in this experiment? Pick 2

• Temperature

• Surface area

• Agitation

• Pressure

Water Molecule

A small polar covalent molecule (does not share electrons equally)

Partial charges

Multiple Choice

Which of these is correct about water?

• small polar molecule

• small nonpolar molecule

• small uncharged molecule

• small ionic molecule

Post Lab Questions

• 3) What can we assume about the type of solute kool-Aid is compared to that of water (“Like dissolves Like”)?

​Does Kool-Aid dissolve in water? (water is a polar covalent molecule)

Polar solvent dissolve polar solutes (polar covalent molecules, salts/ionic molecules, acids, and bases)

Non-polar solvents dissolve ONLY non-polar solutes

Multiple Choice

What can we assume about the type of solute Kool-Aid is compared to that of water (“Like dissolves Like”)?

• Must be a polar solute

• Must be a non-polar solute

• Must be the magic of Kool-Aid

Post Lab Questions Part 2

• 1) In the lab what is the solute:

​Solute is the substance that is being dissolved.

​Kool-Aid Powder

Water

Post Lab Questions Part 2

• 2) In the lab what is the solvent:

​Solvent is the substance that is used to dissolve a solute.

​Kool-Aid Powder

Water

Match

Match the following

• Solute

• Solvent

• An amazing person!

Kool-Aid powder

Water

ME!

• Kool-Aid powder

• Water

• ME!

Post Lab Questions Part 2

• 3) Define the rate of dissolution.

how fast a solute dissolves in the solvent

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Post Lab Questions Part 2

• 4) What are three factors that affect solubility of a solid or liquid?

​Agitation
Physically mixing

​Temperature
Increase or decrease temperature

​Surface Area
Change in particle size

Multiple Choice

Bonus question: A factor that strictly (only) affects gasses. Why when you open a soda can it goes psst, or hiss

• Pressure

• Agitation

Post Lab Questions Part 2

• 5) Solubility Rule

Multiple Choice

"Like dissolves Like" is used to predict what?

• Solubility

• Reactivity

• Equilibrium

Open Ended

What was your favorite part of the lab?

Open Ended

What did you learn from completing the lab?