Housekeeping: We will finish pH this week and I'd like to give you two a short quiz before break.
Content Review:
Textbook: Chapter 8
Links: IB Chemistry Home Notes
Agenda:
1. Acid/base theory
2. Practice with conjugate acids & bases identification.
3. Discover properties of acids and bases.
4. The pH scale
Mission 1: Acid-Base Theories.
Mission Objectives. You should be able to:
1. Compare and contrast acid/base theories.
2. Explain why Arrhenius' model had to be replaced.
3. Identify conjugate acid/base pairs.
Mr. Thornley is on the case.
Content Review:
Textbook: Chapter 8
Links: IB Chemistry Home Notes
Agenda:
1. Acid/base theory
2. Practice with conjugate acids & bases identification.
3. Discover properties of acids and bases.
4. The pH scale
Mission 1: Acid-Base Theories.
Mission Objectives. You should be able to:
1. Compare and contrast acid/base theories.
2. Explain why Arrhenius' model had to be replaced.
3. Identify conjugate acid/base pairs.
Mr. Thornley is on the case.
Let's Practice! Page 243 in your text, blue box problems.
Mission 2: Equal and Opposite.
Mission Objectives. You should be able to:
1. List and describe the properties of acids and bases.
2. Identify the acids and bases needed to make different salts.
Acids react with metals, bases and carbonates to form salts. You are familiar with how to write chemical equations, so don't act surprised when you see the prompts. They are outlined on pages 245-246 in your text. But you know we always have to have our dude Mr. Thornley's opinion on the matter.
Mission 2: Equal and Opposite.
Mission Objectives. You should be able to:
1. List and describe the properties of acids and bases.
2. Identify the acids and bases needed to make different salts.
Acids react with metals, bases and carbonates to form salts. You are familiar with how to write chemical equations, so don't act surprised when you see the prompts. They are outlined on pages 245-246 in your text. But you know we always have to have our dude Mr. Thornley's opinion on the matter.
Let's Practice! Page 248, blue box questions.
Mission 3: All About That pH!
Mission Objectives. You should be able to:
1. Calculate pH and pOH given the formula.
2. Understand that a change of one on a pH scale represents a change of 10X in the [H+].
3. Explain the arrangement of the pH scale in terms of acidity, neutrality and alkalinity.
We will start this lesson with an overview. Mr. Thornley tagged Mr. Anderson and so now he will jump into the ring and do his thing.
Mission 3: All About That pH!
Mission Objectives. You should be able to:
1. Calculate pH and pOH given the formula.
2. Understand that a change of one on a pH scale represents a change of 10X in the [H+].
3. Explain the arrangement of the pH scale in terms of acidity, neutrality and alkalinity.
We will start this lesson with an overview. Mr. Thornley tagged Mr. Anderson and so now he will jump into the ring and do his thing.
We will work on some practice problems in class and for homework. It's important that you be able to calculate pH and pOH given any set of relevant information.
Mission 4: What Are You, Strong or Weak? Strong acids and bases disassociate completely in water. This means that the acid/base breaks up completely into their component ions. By contrast, weak acids and bases disassociate only partially. If you look at the ionization of a strong acid/base, you will see that it is a forward reaction only. Examining the ionization of a weak acid/base requires an equilibrium reaction.
Properties of strong acids & bases:
1. Strong acids/bases conduct electricity very well due to the number of ions in solution. 2. Reaction rates using strong acids/bases increase due to the number of ions in solution.
3. For strong acids, the higher the [H+], the lower the pH. For strong bases, the lower the [H+], the higher the pH.
Strong acids: hydrochloric acid, nitric acid, sulfuric acid. All others are WEAK.
Strong bases: sodium hydroxide, potassium hydroxide, rubidium hydroxide and barium hydroxide. All others are WEAK.
Mission 4: What Are You, Strong or Weak? Strong acids and bases disassociate completely in water. This means that the acid/base breaks up completely into their component ions. By contrast, weak acids and bases disassociate only partially. If you look at the ionization of a strong acid/base, you will see that it is a forward reaction only. Examining the ionization of a weak acid/base requires an equilibrium reaction.
Properties of strong acids & bases:
1. Strong acids/bases conduct electricity very well due to the number of ions in solution. 2. Reaction rates using strong acids/bases increase due to the number of ions in solution.
3. For strong acids, the higher the [H+], the lower the pH. For strong bases, the lower the [H+], the higher the pH.
Strong acids: hydrochloric acid, nitric acid, sulfuric acid. All others are WEAK.
Strong bases: sodium hydroxide, potassium hydroxide, rubidium hydroxide and barium hydroxide. All others are WEAK.
Mission 5: Acid Deposition.
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