Given the dissociation constants for each deprotonation, what is the dissociation constant for the overall reaction (Ka")? H3PO4 + H20 - H2PO4° + H30* Ka = 7.11 x 10-3 H2PO4 + H20 HPO42- + H30* Ka' = 6.32 x 10-8 Overall: H3PO4 + 2 H20 HPO,2 +2 H30* Ka" = ?

Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter6: An Overview Of Organic Reactions
Section6.SE: Something Extra
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Question 3
Given the dissociation constants for each deprotonation, what is the dissociation constant for the overall reaction (Ka")?
H3PO4 + H20
H2PO4 + H30*
Ka = 7.11 x 10-3
H2PO4 + H20 +
HPO,2- + H30*
Ka' = 6.32 x 10-8
Overall: H3PO4 + 2 H20
HPO,2- + 2 H30*
Ka" = ?
1.13 x 105
2.23 x 109
8.89 x 10-6
4.49 x 10-10
Transcribed Image Text:Question 3 Given the dissociation constants for each deprotonation, what is the dissociation constant for the overall reaction (Ka")? H3PO4 + H20 H2PO4 + H30* Ka = 7.11 x 10-3 H2PO4 + H20 + HPO,2- + H30* Ka' = 6.32 x 10-8 Overall: H3PO4 + 2 H20 HPO,2- + 2 H30* Ka" = ? 1.13 x 105 2.23 x 109 8.89 x 10-6 4.49 x 10-10
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