An analytical chemist weighs out 0.297 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilledwater. He then titrates this solution with 0.1900 M NaOH solution. When the titration reaches the equivalence point, the chemist finds hehas added 18.8 mL of NaOH solution.Calculate the molar mass of the unknown acid. Be sure your answer has the correct number of significant digits.mol

We calculate normality of acid and base then use this formula N1V1 = N2V2

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Calculate the molar mass of the unknown acid. Be sure your answer has the correct number of significant digits.

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter4: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 135CP: A 0.500-L sample of H2SO4 solution was analyzed by taking a 100.0-mL aliquot and adding 50.0 mL of...

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Concept explainers

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.

Question

An analytical chemist weighs out 0.297 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled
water. He then titrates this solution with 0.1900 M NaOH solution. When the titration reaches the equivalence point, the chemist finds he
has added 18.8 mL of NaOH solution.
Calculate the molar mass of the unknown acid. Be sure your answer has the correct number of significant digits.
mol

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A 0.500-L sample of H2SO4 solution was analyzed by taking a 100.0-mL aliquot and adding 50.0 mL of 0.213 M NaOH. After the reaction occurred, an excess of OH ions remained in the solution. The excess base required 13.21 mL of 0.103 M HCl for neutralization. Calculate the molarity of the original sample of H2SO4. Sulfuric acid has two acidic hydrogens.