do now textbook open your textbook to page 407 answer all of the questions – compare your answers...

Do NOW

Textbook

Open your textbook to page 407 Answer all of the questions – compare your answers with your table group.

Review

Quiz each other on chapter 11 vocabulary.

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Homework and Announcements

• Due – • Textbook pages 402-406• Vocabulary mind map in notebook

• Vocabulary Quiz Today• Science report updates

• Homework USA TestPrep, Remediation

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Quick Review

• What is a solution?

• What is a solvent?

• What is a solute?

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mixture containing a solvent and at least one solute

part of solution – usually largest amountuniversal solvent – H20

part of solution that is dissolved by the solvent

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SC.8.P.8.9 Distinguish among mixtures (including solutions) and pure substances.

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Table of Contents: Solubility

L.O. SWBAT determine what factors affect solubility.

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Dilute Solution vs Concentrated Solution

dilute solution – mixture with only a little solute dissolved in the solvent.

concentrated solution – mixture with a lot of solute dissolved in the solvent.

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Solubility

The maximum amount of solute that can dissolve in a specific amount of solvent usually 100 g.

g of solute

100 g water

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Saturated vs Unsaturated

A saturated solution contains the maximum

amount of solute that can dissolve.

Un-dissolved solute remains.

If you can continue to dissolve more solute in

a solution then it is unsaturated .

Read

Page 403 – Working with solubility

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Apply your Knowledge

At 40C, the solubility of KBr is 80 g/100 g H2O.

Indicate if the following solutions are

(1) saturated or (2) unsaturated

A. ___60 g KBr in 100 g of water at 40C

B. ___200 g KBr in 200 g of water at 40C

C. ___25 KBr in 50 g of water at 40C

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LecturePLUS Timberlake 11

Affect of Temperature

Temperature Solubility (g/100 g H2O)

KCl(s) NaNO3(s)

0° 27.6 74

20°C 34.0 88

50°C 42.6 114

100°C 57.6 182

The solubility of most solids increases as temperature increases.

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Affect of Temperature

Temperature Solubility (g/100 g H2O)

CO2(g) O2(g)

0°C 0.34 0.0070

20°C 0.17 0.0043

50°C 0.076 0.0026

The solubility of most gases decreases with an increase in temperature.

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Learning Check

A. Why would a bottle of carbonated drink

possibly burst (explode) when it is left out

in the hot sun ?

B. Why would fish die in water that gets too warm?

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Answers

A. Gas in the bottle builds up as the gas becomes less soluble in water at high temperatures, which may cause the bottle to explode.

B. Because O2 gas is less soluble in warm

water, the fish may not obtain the needed

amount of O2 for their survival.

Read

Page 404 – Factors Affecting Solubility

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Summary

Imagine you work for a bottling company and the cola your company produces keeps coming out flat. Write an e-mail to your boss describing changes you should make to have the ideal conditions for bottling fizzy cola.

Use vocabulary words. (Pages 404-405)

Solubility, pressure, solvent, temperature

Atomic Model - Review• Packet– Due by the end of class

• Question: Can the atomic model explain patterns in nature?

• Claim: Elements in the same group have the same # of valence e –. As a result, elements in each group have similar properties.

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Independent Work

Vocabulary Quiz Remediation

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