CH102 Postlab 11 Titrations

CH102 Postlab 11 Titrations - Trial 1 concentration of MnO...

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CH102 Postlab 11 Titrations http://www.webassign.net/v4cgiracollin@ncsu/student.pl?t=200511. .. 1 of 2 11/19/2005 1:40 AM WebAssign.net Saturday, November 19, 2005 01:40 AM EST Logged in as racollin@ncsu. Logout Home | My Assignments | Grades | Communication | Calendar Guide | Help | My Options Home > My Assignments > CH102 Postlab 11 Titrations (Postlab) COLLINS RYAN ALAN CH 102, section 051, Fall 2005 Instructor: robert wilcox TA North Carolina State University About this Assignment Due: Friday, November 18, 2005 11:00 PM EST Current Score: 25 out of 25 Question Score Submissions Made: 3 out of 5 pts 1 -/5 2 -/5 3 -/5 4 -/5 5 -/5 View: All Responses Notes 1. Consider a different titration for this exercise. Potassium permanganate (KMnO 4 ) is the titrant and hydrogen peroxide (H 2 O 2 ) analyte according to the following balanced chemical equation. ( Please note the non-1:1 stoichiometry! ) 2MnO 4 1- + 5H 2 O 2 + 6H 1+ 2Mn 2+ + 5O 2 + 8H 2 O Use the data given below to complete the table for an example of this titration. Data Table. Titration of Hydrogen Peroxide with Potassium Permanganate
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Unformatted text preview: Trial 1 concentration of MnO 4 1-0.040 M vol H 2 O 2 solution 2 mL mass H 2 O 2 solution 2.009 g vol of MnO 4 1-18.90 mL mmol of MnO 4 1-.756 [0.756] mmol mmol of H 2 O 2 1.89 [1.89] mmol mass of H 2 O 2 .06425 [0.06426] g mass % of H 2 O 2 in the original sample 3.1989 [3.199] % molarity of H 2 O 2 in the original sample .945 [0.945] M pts 2. You are now answering the last question of the last Postlab assignment in CH102 Postlab 11 Titrations http://www.webassign.net/v4cgiracollin@ncsu/student.pl?t=200511. .. 2 of 2 11/19/2005 1:40 AM 1-/0 View: All Responses Notes CH102. Which of the following words or phrases best describes your emotions at this point? (o) YEE-HAW!!! (_) I am SO outta here! (_) Glory Hallelujah! (_) Aw, nuts. All good things must end. (_) I can't wait for my next chemistry lab course! Ask Your Teacher Extension Request Home My Assignments WebAssign tm 4.0 1997-2005 by North Carolina State University. All rights reserved....
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CH102 Postlab 11 Titrations - Trial 1 concentration of MnO...

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