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Science
ChemistryChemistry & Chemical Reactivity10th Edition

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Chapter 16, Problem 25PS
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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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Problem 4PS
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Problem 7PS
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Problem 20PS
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Problem 22PS
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Problem 31PS
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Problem 36PS
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Problem 38PS
Problem 39PS
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Problem 42PS
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Problem 44PS
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Problem 79PS
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Problem 84PS
Problem 85GQ
Problem 86GQ
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Problem 88GQ
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Problem 93GQ
Problem 94GQ
Problem 95GQ
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Problem 98GQ
Problem 99GQ
Problem 100GQ
Problem 101GQ
Problem 102GQ
Problem 103GQ
Problem 104GQ
Problem 105GQ
Problem 106GQ
Problem 107GQ
Problem 108GQ
Problem 109GQ
Problem 110GQ
Problem 111IL
Problem 112IL
Problem 113IL
Problem 114IL
Problem 115IL
Problem 116IL
Problem 117IL
Problem 118IL
Problem 119SCQ
Problem 120SCQ
Problem 121SCQ
Problem 122SCQ
Problem 123SCQ
Problem 124SCQ
Problem 125SCQ
Problem 126SCQ
Problem 127SCQ
Problem 128SCQ
Problem 129SCQ
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

If each of the salts listed here were dissolved in water to give 0.10M solution, which solution would have the highest pH? Which would have the lowest pH?

(a) Na2S

(b) Na3PO4

(c) NaH2PO4

(d) NaF

(e) NaCH3CO2

(f) AlCl3

Interpretation Introduction

Interpretation:

The highest pH and lowest pH has to be determined when the given solutions are dissolved in the water to give 0.10M solution.

Concept introduction:

pH is the unit of measurment for determining the acidity or alkalinity of a solution.

The mathematical definition of pH is the negative logarithm of the molar hydrogen ion concentration.

pH =  -log[H+]

Explanation

Given:

  1. a) Na2S

  Na2S dissociates into S2- and Na+ ions. The S2- ion abstracts a proton from water to form hydroxide ions. Therefore, the solution is basic and the pH value is greater than the 7. Na+ does not affect the pH of the solution.

  S2-(aq) + H2O(l)⇌HS- (aq) + OH-(aq)   Kb=1×105

  1. b) Na3PO4

    Na3PO4 dissociates into PO43- and Na+ ions. The PO43- ions abstract a proton from water to form hydroxide ions. Therefore, the solution is basic and the pH value is greater than the 7. Na+ does not affect the pH of the solution.

    PO43-(aq) + H2O(l) ⇌HPO42-(aq) + OH-(aq)  Kb= 2.8×10-2

  2. c) NaH2PO4

    NaH2PO4 dissociates into H2PO4- and Na+ ions. The H2PO4- ion abstracts a proton from water to form hydroxide ions. Therefore, the solution is basic and the pH value is greater than the 7. Na+ does not affect the pH of the solution.

H2PO4-(aq) + H2O(l)⇌H3PO4(aq) + OH-   Kb=1

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Sect-16.2 P-16.1CYUSect-16.4 P-16.2CYUSect-16.5 P-16.3CYUSect-16.7 P-16.4CYUSect-16.7 P-16.5CYUSect-16.7 P-16.6CYUSect-16.7 P-16.7CYUSect-16.7 P-16.8CYUSect-16.8 P-16.9CYUSect-16.10 P-1.1ACP
Sect-16.10 P-1.2ACPSect-16.10 P-1.3ACPSect-16.10 P-2.1ACPSect-16.10 P-2.2ACPSect-16.10 P-2.3ACPSect-16.10 P-2.4ACPSect-16.10 P-2.5ACPCh-16 P-1PSCh-16 P-2PSCh-16 P-3PSCh-16 P-4PSCh-16 P-5PSCh-16 P-6PSCh-16 P-7PSCh-16 P-8PSCh-16 P-9PSCh-16 P-10PSCh-16 P-11PSCh-16 P-12PSCh-16 P-13PSCh-16 P-14PSCh-16 P-15PSCh-16 P-16PSCh-16 P-17PSCh-16 P-18PSCh-16 P-19PSCh-16 P-20PSCh-16 P-21PSCh-16 P-22PSCh-16 P-23PSCh-16 P-24PSCh-16 P-25PSCh-16 P-26PSCh-16 P-27PSCh-16 P-28PSCh-16 P-29PSCh-16 P-30PSCh-16 P-31PSCh-16 P-32PSCh-16 P-33PSCh-16 P-34PSCh-16 P-35PSCh-16 P-36PSCh-16 P-37PSCh-16 P-38PSCh-16 P-39PSCh-16 P-40PSCh-16 P-41PSCh-16 P-42PSCh-16 P-43PSCh-16 P-44PSCh-16 P-45PSCh-16 P-46PSCh-16 P-47PSCh-16 P-48PSCh-16 P-49PSCh-16 P-50PSCh-16 P-51PSCh-16 P-52PSCh-16 P-53PSCh-16 P-54PSCh-16 P-55PSCh-16 P-56PSCh-16 P-57PSCh-16 P-58PSCh-16 P-59PSCh-16 P-60PSCh-16 P-61PSCh-16 P-62PSCh-16 P-63PSCh-16 P-64PSCh-16 P-65PSCh-16 P-66PSCh-16 P-67PSCh-16 P-68PSCh-16 P-69PSCh-16 P-70PSCh-16 P-71PSCh-16 P-72PSCh-16 P-73PSCh-16 P-74PSCh-16 P-75PSCh-16 P-76PSCh-16 P-77PSCh-16 P-78PSCh-16 P-79PSCh-16 P-80PSCh-16 P-81PSCh-16 P-82PSCh-16 P-83PSCh-16 P-84PSCh-16 P-85GQCh-16 P-86GQCh-16 P-87GQCh-16 P-88GQCh-16 P-89GQCh-16 P-90GQCh-16 P-91GQCh-16 P-92GQCh-16 P-93GQCh-16 P-94GQCh-16 P-95GQCh-16 P-96GQCh-16 P-97GQCh-16 P-98GQCh-16 P-99GQCh-16 P-100GQCh-16 P-101GQCh-16 P-102GQCh-16 P-103GQCh-16 P-104GQCh-16 P-105GQCh-16 P-106GQCh-16 P-107GQCh-16 P-108GQCh-16 P-109GQCh-16 P-110GQCh-16 P-111ILCh-16 P-112ILCh-16 P-113ILCh-16 P-114ILCh-16 P-115ILCh-16 P-116ILCh-16 P-117ILCh-16 P-118ILCh-16 P-119SCQCh-16 P-120SCQCh-16 P-121SCQCh-16 P-122SCQCh-16 P-123SCQCh-16 P-124SCQCh-16 P-125SCQCh-16 P-126SCQCh-16 P-127SCQCh-16 P-128SCQCh-16 P-129SCQ

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