Answered: The pH of a solution made up to contain…

The pH of a solution made up to contain 0.240 M H3PO4 and 0.480 M NaH2PO4 is- (Ka1= 7.11 x 10-3; Ka2= 6.32 x 10-8 Ka3= 4.5 x 10-13)

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter14: Acid-base Equilibria

Section: Chapter Questions

Problem 76E: The pH of a 0.10-M solution of caffeine is 11.16. Determine Kb for caffeine from these data:...

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Question

The pH of a solution made up to contain 0.240 M H3PO4 and 0.480 M NaH2PO4
is- (Ka1= 7.11 x 10-3; Ka2= 6.32 x 10-8 Ka3= 4.5 x 10-13)
A. 0.44
B. 0.14
C. 2.45
D. 11.55
O E. 13.56

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