Bonus_Replacement HW#4

Bonus_Replacement HW#4 - Bonus/Replacement HW#4

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Bonus/Replacement HW#4 (Homework) BARAKAT FARRIS CH101, section 003, Fall 2008 Instructor: Lori Petrovich Web Assign Current Score: 0 out of 5 Due: Friday, November 21, 2008 11:59 PM EST Description REMINDER: EXAM 4 IS ON FRIDAY, NOVEMBER 21, 2008. This bonus/replacement homework is good preparation for Exam 4. Most answers are not case sensitive. Therefore 'e' or 'E' look the same to webassign. The only case-sensitive answers are for element symbols. Thus iron should be 'Fe', not 'FE' or 'fe'. General Instructions for Writing Precipitation and Redox Reactions: For precipitation reactions, write reactants and products in the following order: coefficient Cation + coefficient Anion -> Precipitate 1. For redox reactions, write reactants and products in the following order: coefficient Ox 1 + coefficient Red 2 -> coefficient Red 1 + coefficient Ox 2 2. 3. Do not enter coefficients of '1' 4. Write subscripts as numbers with no special character, but use a "^" before each superscript. Always write the number before the sign and always include '1'. Thus, HCO 3 1- would be HCO3^1-. 5. A single electron would be e^1- 6. Do not use (g), (l), (s) or (aq) 7. Answers are case sensitive. Spaces are ignored, so insert them as you wish for readability. 8. Click on the "eye" symbol to see your formatted response. 9. The input requests are the same as those used in your homework assignments. 10. Please take the SI Survey at 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. Bonus/Replacement HW#4 http:[email protected]/ .. 1 of 15 12/14/08 3:11 AM
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The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. --/0.26 points | 0/5 submissions Suppose 0.60 moles of CaCl 2 is dissolved in 2500 mL of water. Calculate the concentration of cation, anion and all ions in M (mol/L). (Input your answer to as many significant figues as you would like. Two significant figures should be sufficient.) a) [Ca 2+ ] (No Response) 0.24 M b) [Cl 1- ] (No Response) 0.48 M c) [all ions] (No Response) 0.72 M 2. --/0.26 points | 0/5 submissions Write the names for the following substances: a) ZnBr 2 : (No Response) zinc(II) bromide -or- zinc bromide b) Al 2 O 3 : (No Response) aluminum oxide c) NiCl 2 : (No Response) nickel(II) chloride d) Fe(NO 3 ) 3 : (No Response) iron(III) nitrate
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This note was uploaded on 01/25/2011 for the course CH 101 taught by Professor Bigham during the Spring '08 term at N.C. State.

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Bonus_Replacement HW#4 - Bonus/Replacement HW#4

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