Key Prob Set 6 09-106 S 11

# Key Prob Set 6 09-106 S 11 - of 0.100 M NH 4 Br(aq How many...

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1 Name ______________________________ _ 09-106 Spring 2011 Recitation ( CIRCLE ONE TA and ONE TIME ): Christian Steve Brendan 6:30 7:30 Problem Set 6 DUE Fri. 4/8 by 9 PM at DH 2114 (20 points) 1. 100.0 mL of 0.100 M H 2 NNH 2 (aq) ( K b = 3.0 x 10 -6 ) are titrated with 0.200 M HNO 3 (aq). Calculate the pH: ( This problem has 3 parts – part (c) is on the next page ). (a) at the half-equivalence point (b) at the equivalence point

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2 (c) after the addition of 100.0 mL of HNO 3 (aq) 2. Exactly 1.0 L of LiIO 3 (aq) gives the same color with methyl red as 1.0 L of NaOH(aq). Which solution will “neutralize” the bigger volume of 0.10 M HNO 3 (aq)? Briefly explain.
3 3. 10.00 mL of 0.100 M CH 3 COOH(aq) is titrated with 0.100 M NH 3 (aq). (a) Calculate the pH after the addition of 5.00 mL of NH 3 (aq). (b) What is/are the majority species after the addition of 10.00 mL of NH 3 (aq)?

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4 4. You have at your disposal an ample quantity of a solution of 1.00 M KOH(aq) and 1.00 L of a solution
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Unformatted text preview: of 0.100 M NH 4 Br(aq). How many mL of the KOH solution should be added to the NH 4 Br solution to produce a buffer of pH 10.0? 5. Virtual Lab This Virtual Lab activity involves using acid-base reactions and equilibria to identify an unknown acid. Please go to the chemcollective link on the Assignments site to access the Unknown Acid assignment. Please turn in a printed copy of the web pages confirming your correct answer and an outline of your method and detailed calculations used . Technical help is available via email to [email protected] . You may also contact Mike Karabinos ([email protected]) with further problems regarding the website and/or Virtual Lab software. Mike will have a help session to address questions and problems with the Virtual Lab components of problem sets. This will be announced on Blackboard....
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## This note was uploaded on 09/29/2011 for the course CHEMISTRY 09-106 taught by Professor Vuocolo during the Fall '09 term at Carnegie Mellon.

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Key Prob Set 6 09-106 S 11 - of 0.100 M NH 4 Br(aq How many...

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