To measure the amount of calcium carbonate CaCO3 in a seashell, an analytical chemist crushes a 2.900g sample of the shell to a fine powder and titrates it to the endpoint with 162.mL of 0.310M hydrogen chloride HCl solution. The balanced chemical equation for the reaction is: 2HClaq + CO2−3aq + H2CO3aq -> 2Cl−aq Calculate the mass percent of CaCO3 in the sample.
To measure the amount of calcium carbonate CaCO3 in a seashell, an analytical chemist crushes a 2.900g sample of the shell to a fine powder and titrates it to the endpoint with 162.mL of 0.310M hydrogen chloride HCl solution. The balanced chemical equation for the reaction is: 2HClaq + CO2−3aq + H2CO3aq -> 2Cl−aq Calculate the mass percent of CaCO3 in the sample.
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
Chapter4: Stoichiometry Of Chemical Reactions
Section: Chapter Questions
Problem 91E: A sample of solid calcium hydroxide, Ca(OH)2, is allowed to stand in water until a saturated...
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To measure the amount of calcium carbonate
CaCO3
in a seashell, an analytical chemist crushes a
2.900g
sample of the shell to a fine powder and titrates it to the endpoint with
162.mL
of
0.310M
hydrogen chloride
HCl
solution.
The balanced chemical equation for the reaction is:
2HClaq + CO2−3aq + H2CO3aq -> 2Cl−aq
Calculate the mass percent of
in the sample. Be sure your answer has the correct number of significant digits.
CaCO3
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