Monday, November 12, 2012

Lesson 17:

In lesson 17, we went over acids and bases. Acids and bases are specific categories of solutions. Acids have a more sour taste, and bases have a more bitter taste. Bases also tend to be more slippery, such as soaps and detergents. In order to identify what chemicals are acids and which are bases, chemists have invented indicators. Indicators change color when they come into contact with acids and bases. Moreover, the pH scale helps put values to acids and bases between 0 and 14. Something important to know, is that with a pH below 7 at 25 degrees C are acids, and pH above 7 at 25 degrees C are bases. Solutions at or near 7 are neutral. Homework below!

Homework:

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4 comments:

  1. AnonymousNovember 14, 2012 at 2:50 PM

    Great work!

    ReplyDelete
  2. AnonymousNovember 17, 2012 at 10:13 AM

    Looks good, but your practice problems are a little hard to read. maybe it's the pen or the lighting, but it's hard for me to read on my iPad. good job thiugh!

    ReplyDelete
  3. AnonymousNovember 19, 2012 at 3:03 PM

    Nice job!

    ReplyDelete
  4. Tory ReavisNovember 29, 2012 at 8:14 PM

    Looking good!

    ReplyDelete

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