Module 5 Intro
1. Module 5 Intro
1.2. In this Module
Module 5—Acids and Bases
In This Module
Lesson 1: Properties of Acids and Bases
Acids and bases had been used for centuries long before any theoretical understanding for their behaviour. In this lesson you will briefly review concepts related to acids and bases introduced in Science 10. Once you complete this review, you will learn about Arrhenius’s theory, its limitations in explaining and predicting the behaviour of acids and bases, and about a new particle called the hydronium ion.
- What are the empirical properties of acids and bases?
- How are acids and bases named?
- Why is the original Arrhenius theory considered to be an incomplete explanation of the behaviour of acids and bases?
Lesson 2: Calculating pH and pOH
The concentration of acidic or basic particles within a chemical system can be expressed using a number other than molar concentration. What mathematical formulas are required to calculate these values? In this lesson you will learn how to associate pH and pOH with the acidity or basicity of a solution and gain an understanding of the relative concentrations of hydronium and hydroxide ions within a solution.
- How do you calculate pH, [H3O+(aq)], pOH, and [OH–(aq)]?
Lesson 3: Strength of Acids and Bases
Equal concentrations of ethanoic acid, commonly called vinegar, and hydrochloric acid will not have the same pH. Why? How do weak acids and bases differ from strong acids and bases? How can any differences be explained using the theories that have been introduced throughout this unit?
- How are the empirical properties of weak acids and bases different from those of strong acids and bases?
- What are polyprotic acids and bases?
Lesson 4: Multi-step pH and pOH Calculations
In this lesson you will apply the formulas introduced in Lesson 3 to help you address a variety of practical applications, including
- preparing a solution with a specific pH
- predicting the pH of a solution using the mass of solute
- predicting the pH of a solution produced by the dilution of another solution
- How are ionization and dissociation accounted for when calculating concentration of acidic and basic particles within a solution?
- How can a solution’s pH be predicted using mass of solute and solution volume?
- Why is the pH of a diluted solution able to be predicted?
Lesson 5: Indicators
pH can be estimated using acid-base indicators. Indicators are molecules that have distinct colours at various pH values. In this lesson you will learn how to use indicator colour to estimate the pH of a solution. You will also complete a virtual lab that demonstrates how to use indicators.
-
What are acid-base indicators?
-
How are acid-base indicators used to estimate the pH of a solution?
Module Assessment
The assessment in this module consists of the following:
- Module 5: Lesson 1 Assignment
- Module 5: Lesson 3 Assignment
- Module 5: Lesson 4 Assignment
- Module 5: Lesson 5 Assignment