Introduction To Chemistry
5th Edition
ISBN: 9781259911149
Author: BAUER, Richard C., Birk, James P., Marks, Pamela
Publisher: Mcgraw-hill Education,
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Chapter 13, Problem 107QP
Interpretation Introduction
Interpretation:
The ionic compound that should be added to make the buffer solution if acetic acid has already been added to the water is to be identified.
Concept Introduction:
Buffered solutions are the solutions that resist change in
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You wish to add enough NaOCl (sodium hypochlorite) to a 150 m³ swimming pool to provide
a dose of 5.0 mg/L TOTOCI as Cl2.
(a) How much NaOCI (kg) should you add? (Note: the equivalent weight of NaOCl is
based on the reaction: NaOCl + 2H + 2 e→CI + Na +H₂O.) (10 pts) (atomic
weight: Na 23, O 16, C1 35.5)
(b) The pH in the pool after the NaOCl addition is 8.67. To improve disinfection, you
want at least 90% of the TOTOCI to be in the form of HOCI (pKa 7.53). Assuming
that HOCI/OCI is the only weak acid/base group in solution, what volume (L) of
10 N HCl must be added to achieve the goal? (15 pts)
Note that part a) is a bonus question for undergraduate students. If you decide not to work on
this part of the question, you many assume TOTOCI = 7×10-5 M for part b).
Part A
2K(s)+Cl2(g)+2KCI(s)
Express your answer in grams to three significant figures.
Part B
2K(s)+Br2(1)→2KBr(s)
Express your answer in grams to three significant figures.
Part C
4Cr(s)+302(g)+2Cr2O3(s)
Express your answer in grams to three significant figures.
Part D
2Sr(s)+O2(g) 2SrO(s)
Express your answer in grams to three significant figures.
Thank you!
A solution contains 10-28 M TOTCO3 and is at pH 8.1. How much HCI (moles per liter of
solution) is required to titrate the solution to pH 7.0? (H2CO3: pKa1=6.35, pKa2=10.33)
Chapter 13 Solutions
Introduction To Chemistry
Ch. 13 - How do acids and bases differ from other...Ch. 13 - Prob. 2QCCh. 13 - Prob. 3QCCh. 13 - Prob. 4QCCh. 13 - Prob. 5QCCh. 13 - Prob. 6QCCh. 13 - Prob. 1PPCh. 13 - Prob. 2PPCh. 13 - Prob. 3PPCh. 13 - Prob. 4PP
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