Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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C please
Transcribed Image Text:tes AQA English Litera
© Oxford Jr
A in water and dilutes the solution to 250 cm
in a volumetric flask. The student fills a
burette with this solution.
The student adds 25.0 cm3 of 0.224 mol dm-3
KOH to a conical flask.
31.25 cm' of compound A was required for
reach the end point.
The formula of compound A can be simplified
as H,X. The equation in the titration is:
Н.X(аq) + 2КОН аq) — К,X(аq) + 2H,О(1)
Calculate the amount, in mol, of compound
A used in the titration.
a
b Galculate the molar mass of
compound A.
The percentage composition by
mass of compound A is C, 40.68%;
H, 5.08%; O, 54.24%
Calculate the empirical and molecular
fo mulae of compound A.
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