Chapter 7 Acids, Bases, and Solutions · Chapter 7 Acids, Bases, and Solutions Table of Contents...
Transcript of Chapter 7 Acids, Bases, and Solutions · Chapter 7 Acids, Bases, and Solutions Table of Contents...
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Chapter 7 Acids, Bases, and Solutions
Table of ContentsChapter Preview
7.1 Understanding Solutions
7.2 Concentration and Solubility
7.3 Describing Acids and Bases
7.4 Acids and Bases in Solution
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
1. A solution is an example of aa. homogeneous colloid.b. heterogeneous colloid.c. homogeneous mixture.d. heterogeneous mixture.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
1. A solution is an example of aa. homogeneous colloid.b. heterogeneous colloid.c. homogeneous mixture.d. heterogeneous mixture.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
2. Magnesium sulfide and aluminum fluoride area. ionic compounds.b. molecular compounds.c. covalent electrons.d. radioactive elements.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
2. Magnesium sulfide and aluminum fluoride area. ionic compounds.b. molecular compounds.c. covalent electrons.d. radioactive elements.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
3. When dissolved in water, ionic compoundsa. conduct electricity.b. make the water cloudy.c. form double and triple bonds.d. do not conduct electricity.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
3. When dissolved in water, ionic compoundsa. conduct electricity.b. make the water cloudy.c. form double and triple bonds.d. do not conduct electricity.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
4. When dissolved in water, molecular compounds a. conduct electricity.b. make the water cloudy.c. form double and triple bonds.d. do not conduct electricity.
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Chapter 7 Acids, Bases, and Solutions
Chapter Preview Questions
4. When dissolved in water, molecular compounds a. conduct electricity.b. make the water cloudy.c. form double and triple bonds.d. do not conduct electricity.
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Chapter 7 Acids, Bases, and Solutions
Suppose you dissolve ateaspoon of salt in a glass ofwater. Is it possible to recoverthe salt from the water?Explain.
What are some characteristics of acids and bases?
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Chapter 7 Acids, Bases, and Solutions
Use Related Words
Verb Noun Adjective
indicateTo show; to point to
indicatorSomething that shows or points to
indicativeServing as a sign; showing
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Chapter 7 Acids, Bases, and Solutions
Use Related Words
Verb Noun Adjective
saturateTo fill up as much as is possible
saturationThe condition of holding as much as is possible
saturatedTo be full; to hold asmuch as is possible
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Chapter 7 Acids, Bases, and Solutions
Use Related Words
Verb Noun Adjective
suspendTo hang so as to allow free movement
suspensionThe condition of hanging or moving freely
suspendedHanging so as to allowfree movement
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Chapter 7 Acids, Bases, and Solutions
Apply It!
Review the words related to saturate. Complete the following sentenceswith the correct form of the word.
1. The sponge could hold no more water.
saturated
2. He continued to add water to the point of .
saturation
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Chapter 7 Acids, Bases, and Solutions
End of Chapter Preview
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Chapter 7 Acids, Bases, and Solutions
Section 1:Understanding
SolutionsWhat are the characteristics of solutions, colloids, and suspensions?What happens to the particles of a solute when a solution forms?How do solutes affect the freezing point and boiling point of a solvent?
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Chapter 7 Acids, Bases, and Solutions
What Is a Solution?A solution has the same properties throughout. It contains solute particles (molecules or ions) that are too small to see.
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Chapter 7 Acids, Bases, and Solutions
What Is a Solution?Solutions can be formed from any combination of solids, liquids, and gases.
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Chapter 7 Acids, Bases, and Solutions
Colloids and SuspensionsColloids and suspensions are mixtures that have different properties than solutions.
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Chapter 7 Acids, Bases, and Solutions
Particles in a SolutionWhen a solution forms, particles of the solvent surround and separate the particles of the solute.
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Chapter 7 Acids, Bases, and Solutions
Salt Dissolving in Water Activity
Click the Active Art button to open a browser window and access Active Art about salt dissolving in water.
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Chapter 7 Acids, Bases, and Solutions
Effects of Solutes on SolventsSolutes lower the freezing point and raise the boiling point of a solvent.
Solid (frozen) water Liquid water solution
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Chapter 7 Acids, Bases, and Solutions
Universal Solvent
Click the Video button to watch a movie aboutuniversal solvent.
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Chapter 7 Acids, Bases, and Solutions
End of Section:Understanding
Solutions
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Chapter 7 Acids, Bases, and Solutions
Section 2:Concentration and Solubility
How is concentration measured?Why is solubility useful in identifying substances?What factors affect the solubility of a substance?
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Chapter 7 Acids, Bases, and Solutions
Calculating a Concentration
To calculate the concentration of a solution, compare the amount of solute to the amount of solution and multiply by 100 percent.
For example, if a solution contains 10 grams of solute dissolved in 100 grams of solution, then its concentration can be reported as 10 percent.
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Chapter 7 Acids, Bases, and Solutions
Calculating a Concentration
Practice Problem
A solution contains 12 grams of solute dissolved in 36 grams of solution. What is the concentration of the solution?
33%
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Chapter 7 Acids, Bases, and Solutions
SolubilitySolubility is a measure of how much solute can dissolve in a solvent at a given temperature.
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Chapter 7 Acids, Bases, and Solutions
Temperature and Solubility
The solubility of the compound potassium nitrate (KNO3) varies in water at different temperatures.
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Chapter 7 Acids, Bases, and Solutions
Temperature and SolubilityReading Graphs:
At which temperature shown in the graph is KNO3 least soluble in water?
KNO3 is least soluble at 0ºC.
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Chapter 7 Acids, Bases, and Solutions
Temperature and SolubilityReading Graphs:
Approximately what mass of KNO3 is needed to saturate a water solution at 40ºC?
Approximately 65 g of KNO3are needed to saturate a water solution at 40ºC.
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Chapter 7 Acids, Bases, and Solutions
Temperature and SolubilityCalculating:
About how much more soluble is KNO3 at 40ºC than at 20ºC?
KNO3 is about twice as soluble at 40ºC as it is at 20ºC.
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Chapter 7 Acids, Bases, and Solutions
Temperature and Solubility
No; the curve shows that solubility increases more with each 20ºC increase in temperature.
Interpreting Data:
Does solubility increase at the same rate with every 20ºC increase in temperature? Explain.
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Chapter 7 Acids, Bases, and Solutions
Links on Solubility
Click the SciLinks button for links on solubility.
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Chapter 7 Acids, Bases, and Solutions
End of Section:Concentration and Solubility
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Chapter 7 Acids, Bases, and Solutions
Section 3:Describing Acids
and BasesWhat are the properties of acids and bases?Where are acids and bases commonly used?
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Chapter 7 Acids, Bases, and Solutions
Properties of Acids and BasesLitmus is an example of an indicator, a compound that changes color when in contact with an acid or a base.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Uses of Acids and BasesAcids and bases have many uses around the home and in industry.
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Chapter 7 Acids, Bases, and Solutions
Links on Acids and Bases
Click the SciLinks button for links on acids and bases.
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Chapter 7 Acids, Bases, and Solutions
End of Section:Describing Acids
and Bases
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Chapter 7 Acids, Bases, and Solutions
Section 4:Acids and Bases
in SolutionWhat kinds of ions do acids and bases form in water?What does pH tell you about a solution?What happens in a neutralization reaction?
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Chapter 7 Acids, Bases, and Solutions
Acids and Bases in SolutionThe table lists some commonly encountered acids and bases.
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Chapter 7 Acids, Bases, and Solutions
Strength of Acids and BasesStrong acids and weak acids act differently in water. Hydrochloric acid is a strong acid. Acetic acid is a weak acid.
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Chapter 7 Acids, Bases, and Solutions
The pH ScaleA low pH indicates that the concentration of hydrogen ions is big. In contrast, a high pH indicates that the concentration of hydrogen ions is low.
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Chapter 7 Acids, Bases, and Solutions
Acid-Base ReactionsIn a neutralization reaction, an acid reacts with a base to produce a salt and water.
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Chapter 7 Acids, Bases, and Solutions
Acid-Base ReactionsEach salt listed in this table can be formed by the reaction between an acid and a base.
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Chapter 7 Acids, Bases, and Solutions
More on the pH Scale
Click the PHSchool.com button for an activityabout the pH scale.
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Chapter 7 Acids, Bases, and Solutions
pH
Click the Video button to watch a movie about pH.
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Chapter 7 Acids, Bases, and Solutions
End of Section:Acids and Bases
in Solution
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Chapter 7 Acids, Bases, and Solutions
QuickTake Quiz
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