12.0 10.0 pH of solution in flask 8.0 Equivalence Point 6.0 4.0 2.0 5 10 15 20 25 30 35 40 45 mL of 0.115 M NAOH added to flask A 50.0 mL sample of a solution of an unknown compound is titrated with a 0.115 M NaOH solution. The titration curve above was obtained.
12.0 10.0 pH of solution in flask 8.0 Equivalence Point 6.0 4.0 2.0 5 10 15 20 25 30 35 40 45 mL of 0.115 M NAOH added to flask A 50.0 mL sample of a solution of an unknown compound is titrated with a 0.115 M NaOH solution. The titration curve above was obtained.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:12.0
10.0
pH of
solution
8.0
Equivalence
Point
6.0
in flask
4.0
2.0
5 10 15 20 25 30 35 40 45
mL of 0.115 M NaOH added to flask
A 50.0 mL sample of a solution of an unknown compound is titrated with a 0.115 M NaOH
solution. The titration curve above was obtained.
a). What would be the molar mass of the unknown acid if the density of the solution is 1.00g/mL
and mass concentration of the acid is 3.00 g/L. Molar Mass =
g/mole
(Please use 3 sig figs for the ans, just provide the value no need for units). (Note: use the plot to
estimate the volume needed to reach the equivalence point)
b). What would be the pKa of the unknown acid? pka
(please use two sig
%3D
figs for the ans) (use the plot above to estimate)
c). What would be the concentration of the HA and conjugate A- when 9.00 mL of 0.115 M
NaOH is used for the titration. (please use 3 sig figs for the ans and just imput the units) (Hint:
use the mmoles of HA estimated from part a)
Concentration of HA =
M
Concentration of A- =
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