A 5.63 g sample of calcium ore was dissolved in HCl and gravimetrically analyzed, through the precipitation
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Question:
A 5.63 g sample of calcium ore was dissolved in HCl and gravimetrically analyzed, through the precipitation of calcium into CaC2O4 · H2O. The precipitate was filtered, washed, dried and ignited at 500 deg C until the weight was constant, giving a final mass of 2.35 grams pure CaCO3 (100.087 g/mol).
Calculate the % Calcium (40.078 g/mol) in the sample.
Group of answer choices
33.4%
41.7%
16.7%
25.4%
Related Book For
Fundamentals of Analytical Chemistry
ISBN: 978-0495558286
9th edition
Authors: Douglas A. Skoog, Donald M. West, F. James Holler, Stanley R. Crouch
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