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Unit 7: Acids, Bases, and Solutions

Unit 7 of our 9-unit course focuses on the topics of Acids, Bases and Solutions. We will discuss such concepts as solution formation, solubility, concentration, molarity, solution stoichiometry, the properties of acids and bases, acid-base neutralization, and acid-base titration. This short 7-day unit will provide the foundation for understand the chemistry of acid and base solutions. There will be several labs - most of which are analytical titration labs. The concepts and mathematics associated with titrations will form the basis of the Semester 2 Maker Project - an Arduino-controlled robotic titrator.

Formation of Solutions

The formation of an aqueous solution can be thought of as occuring in three steps:
  1. Breaking solute particles apart (endothermic step).
  2. Breaking solvent molecules apart (endothermic step).
  3. Surrounding solute particles by solvent particles (exothermic step)

The third step of the process is the exothermic, stabilizing step. It is often referred to as hydration and involves the surrounding of the solute particles by polar water molecules.

View Hydration

First Quiz of Unit

The  Unit 7 Quiz will be  given on Thursday,  March 22.

Visit the Quiz Room.

Just So You Know

Reminder: Every nine weeks, I throw out your lowest three WebAssigns. This accommodates the myriad of requests that I receive from students regarding something that happened that prevented one from not doing the WebAssigns. WebAssigns are never extended ... but instead the score is thrown out. I also make an effort (usually a successful effort) to provide an optional WebAssign that can be used as a replacement of a poor score. Doing the optional WebAssign provides a student with a fourth throw out. This first nine weeks of the second semester, the optional WebAssign is ...

WebAssign: Chapter 15.6-7 Solution Stoichiometry
This is due on Tuesday, April 2. You can either do the WebAssign or take it as your automatic 4th WebAssign that will be dropped. I will be dropping your four lowest scores sometime after April 2.

Periodic Table in Pictures and Words

For those who are connoisseurs of periodic tables or simply would like to relish a great moment of geekery, tap the link below and explore on this interactive periodic table of the elements.

Visit Interactive Periodic Table with Words and Pictures.

FREE: A Chemistry Study Tip

Stretching out your studies over a lengthy period of time so that there are many "visits" of the material is far better than lengthier, less-frequent sessions of intense studies. So what's this have to do with Chemistry class? I'm going to tell you:

A little Chemistry each day helps. Your homework usually includes two WebAssigns - one is a "looking ahead" WebAssign in which you read about something that is coming up next. The other is a "looking behind" WebAssign in which you practice using something that we just learned in class. So why not do the "Looking behind" WebAssign on the evening of the Blue day - the day you were presented with the material. And then do the "Looking ahead" WebAssign on the evening of the Gold day - the evening just prior to when we cover the material the next morning. Hopefully that makes sense ... and it gives you a little Chemistry every day.  =SIGH=

    Online Homework


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Today in Class

>> Thursday, March 22 <<

Focus Question(s):
  • What are the properties of acids and bases?
  • How can a reaction involving solutions be stoichiometrically analyzed in terms of volumes and molarities?

  • Check Chapter 15.6-7 Reading Guide (pp.17-18)
  • Solution Stoichiometry (Selected Qs on pp. 19-20)
  • Lab ABS4 Acid-Base Properties
  • Short Quiz

  • WebAssign: Chapter 16.1-2 Reading Guide (pp.23-24)
  • WebAssign: Chapter 15.6-7 Solution Stoichiometry (optional)

Next Time in Class

>> Thursday, March 22 <<

We will be learning about two models associated with acids and bases. We will be doing selected questions from pp. 23-28. We will be doing the Acid-Base Neutralization Lab (ABS3).

Periodic Tables

Are you in need of a periodic table?  Try one of the following websites:

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