Q2: Draw a picture of a solution and label the parts. How can you tell a solution from a suspension or a colloid? Sketch a distillation apparatus and describe how it works.

6 days

Unit Exam Friday

Today’s Objective: Using a solubility graph, I can determine how much solute can be added to a solution.

1st period AXRK5G

from a liquid solution because it won’t or can’t dissolve Precipitant: A solid that comes from a liquid solution because it won’t or can’t dissolve * From a chemical change * From a physical change

Solubility: The amount of a substance that can be dissolved

Factors That Affect Solubility 1. Nature of the reactants 2. Polarity

3. Temperature: Heating up allows more solute to be dissolved.

4. Surface area Increase the surface area will increase the rate it dissolves.

5. Stirring will increase the surface area exposed and increase solubility.

at a certain temperature Solubility Curve G in H20 Temp C Graph showing how much can be dissolved at a certain temperature

Super-saturated G in H20 Saturated Temp C Unsaturated

Solubility Curves

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Describe a solution at 30C with 50 g Saturated

Which substance is most soluble in H20? Yellow, NaNO2 under 70C Blue, KNO3 over 70C Which substance is most soluble in H20?

Supersaturated Describe the saturation of a solution containing 100 g of potassium bromide solution at 60 C

Sodium Nitrate The most soluble at 0 C

Solubility increases most between 40 & 60 C Sodium Acetate Solubility increases most between 40 & 60 C

Changes the least as temperature changes Table Salt Changes the least as temperature changes

How would cooling a solution affect its solubility? It would hold less solute.

It would increase. How would decreasing the size of a solute’s particle affect its solubility? It would increase.

A super saturated solution is cooled to room temperature A super saturated solution is cooled to room temperature. What would it create? Crystals

When will more salt dissolve than sugar? Never, Sugar’s curve is always above salt Sugar Salt When will more salt dissolve than sugar?