Thursday, December 3, 2009

AB - another day and another question

Today was a day to re-visit some previously learned concepts.
 In what way did you re-visit earlier concepts?
The following handouts were completed:

(1) Acid-Base Equilibrium Overview (handout on moodle)
-the instructions are on the handout
-you may need to consult your notes
-consider the type of each substance (weak acid, weak base, acidic salt, etc…) before writing the equation and need for an ICE chart
-actually go full out and carry out the calculation to determine pH for the last three on the page
(2) Strong Acid-Strong Base Titration (handout on moodle)
-well laid out example in your text (page 598)
(3) Aromatic Reactions (Organic)

What about a few questions to get you thinking? In each case there will be some acid or base leftover. Notice the type of substances [strong A/B? weak A/B salt?] leftover after the reaction....take into account the total volume as you move beyond the neutralization reaction.
(1) Determine the pH of  the solution that is formed when 15.00mL of 0.100M HCl is combined with 25.00mL of 0.0800M NaOH.
(2) Determine the pH of the solution that is formed when 20.0mL of 0.100M acetic acid is combined with 10.0mL of 0.150M NaOH.
(Will the worked out solutions to these posed questions be moodlized later today? Hmmmm... Further hmmm...why is one question outlined in blue, while the other is outlined in red?)  It is a few hours later as I type these red sentences. The solutions to the above two questions (and a few more things) have been moodlized. Have a question while you moodling? Try the post a question forum.

A few jokes to close out this entry. Why did the child study in the airplane ? [The child wanted a higher education.]  Why was the broom late? [It over swept.] There is room for one more. Whats red and flies and wobbles at the same time? [A jelly copter.]