Module 5 Intro

Module 5—Acids and Bases

Module Summary

You have now completed the refrigerator chemistry tour. But before the door is closed, take a look around and observe some other items in the fridge that weren’t discussed in this module. Do any of these items have the properties of an acid or a base?

Think back to the questions you were asked at the beginning of the module:

• Scientific theories are human inventions used to explain events that occur in nature and predict future results. While learning acid-base chemistry, you will pay more attention to different theories. What are the limitations of the different theories you will use?
  
  

• How do significant digits allow appropriate information about acidic and basic solutions to be communicated?

The Arrhenius theory of acids and bases does not explain observed behaviour of some acids and bases. The original theory proposed by Arrhenius has since been modified as a result of knowledge gained through experimentation after it was initially proposed. In your studies within this unit, you found these theories to be successful in explaining many, but not all, of the acid-base phenomena you observed. In Chemistry 30 you will examine other acid-base theories.

At the completion of this module, you should be able to solve for one of the following using appropriate mathematical relationships: pH, [H3O+(aq)], pOH or [OHN–(aq)]. You should also be able to express your answers using appropriate techniques, such as rounding and significant digits.

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