Sulfur containing compound weighing4.8670 grams was digested and purified toform H,SO4. A 25.00-mL of 0.0090 MNaOH was added to the collected H,SO4,and the excess base was then back titratedwith 13.45 mL of 0.0100 M HCl. Calculatethe sulfur content in the sample in parts permillion.This problem involves back titration.Write the two chemical equationsinvolved in the analysis. Identify theanalyte, “bridging" reagent and titrant.Solve for the mole of the analyte usingthe titration values and the stoichrelationships. One mole of H2SO4 isequal to one mole of sulfur in thesample. Solve for the mass of S thenthe ppm S.

Moles = Molarity * Volume (L) Mass = Moles * Molar mass

Sulfur containing compound weighing 4.8670 grams was digested and purified to form H,SO4. A 25.00-mL of 0.0090 M NaOH was added to the collected H2SO4, and the excess base was then back titrated with 13.45 mL of 0.0100 M HCl. Calculate the sulfur content in the sample in parts per million.

Sulfur containing compound weighing 4.8670 grams was digested and purified to form H,SO4. A 25.00-mL of 0.0090 M NaOH was added to the collected H2SO4, and the excess base was then back titrated with 13.45 mL of 0.0100 M HCl. Calculate the sulfur content in the sample in parts per million.

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter15: Acid-base Equilibria

Section: Chapter Questions

Problem 7RQ: Sketch the titration curve for a weak acid titrated by a strong base. When performing calculations...

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Question

Sulfur containing compound weighing
4.8670 grams was digested and purified to
form H,SO4. A 25.00-mL of 0.0090 M
NaOH was added to the collected H,SO4,
and the excess base was then back titrated
with 13.45 mL of 0.0100 M HCl. Calculate
the sulfur content in the sample in parts per
million.
This problem involves back titration.
Write the two chemical equations
involved in the analysis. Identify the
analyte, “bridging" reagent and titrant.
Solve for the mole of the analyte using
the titration values and the stoich
relationships. One mole of H2SO4 is
equal to one mole of sulfur in the
sample. Solve for the mass of S then
the ppm S.

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