HW19 - HW19...

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HW19 (Homework) BARAKAT FARRIS CH101, section 003, Fall 2008 Instructor: Lori Petrovich Web Assign Current Score: 4.91999999 out of 4.99999999 Due: Wednesday, November 19, 2008 11:59 PM EST Description REMINDER: EXAM 4 IS FRIDAY, NOVEMBER 21, 2008. Chapter 12 Acids and Bases Sections 12.1-12.8 Acid-Base Worksheet Acid-Base Worksheet Key Please take the SI Survey at http://courses.ncsu.edu/eci210/lec/001/SIsurvey.html to offer feedback on the SI program. If you did not attend any SI sessions, the survey also requests feedback on reasons students do not attend SI. The survey will be available through??. Instructions The question submission scoring is as follows: Correct on first submission: full points Correct on second submission: full points Correct on third submission: full points Correct on fourth submission: 90% of points Correct on fifth submission: 80% of points Do NOT press 'submit all questions" when you are finished. This will do exactly as indicated, and submit all questions, reducing your score. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. 0.5/0.5 points | 1/5 submissions Please make sure to visit the NCSU class evaluation site at Class Evaluation and fill out the questionnaires posted there. If you need help, please send a message to classeval@ncsu.edu. I will fill out the class evaluation: no yes HW19 http://www.webassign.net/v4cgifbaraka@ncsu/student.pl?h=20. .. 1 of 10 12/14/08 3:11 AM
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0.5/0.5 points | 1/5 submissions Lone pairs are shown only on central atoms in the following Lewis structures. If lone pairs on not present on the central atom, then the structure does not have them. Please: a) Consider all atoms on the molecule, with the exception of halogens. (Halogens are highly electronegative and make poor Lewis Bases.) b) Consider that some molecules can be both an acid and a base. c) Consider that some molecules can be neither an acid nor a base. Select all species that are Lewis acidic d a e c b Select all species that are Lewis basic c d a b e 3. 0.5/0.5 points | 1/5 submissions Give the conjugate base or acid in each case. Enter subscripts normally. Use a carat (shift 6) for superscripts. For example, NH 4 1+ would be entered as NH4^1+. The answers are case sensitive. HW19 http://www.webassign.net/v4cgifbaraka@ncsu/student.pl?h=20. .. 2 of 10
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HW19 - HW19...

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