A sample is known is known to consist of NaOH (40 g/mol) or NaHCO3 (84 g/mol), or Na2CO3 (106 g/mol) or possible compatible mixtures of these, together with inert matter. With methyl orange, a 1.10 g sample requires 31.4 ml of HCl (of which 1.00 ml ≈ 0.0140 g CaO, 56 g/mol). With phenolphthalein, the same weight of sample requires 13.3 ml of the acid. Calculate the percentage of inert matter in the sample.
A sample is known is known to consist of NaOH (40 g/mol) or NaHCO3 (84 g/mol), or Na2CO3 (106 g/mol) or possible compatible mixtures of these, together with inert matter. With methyl orange, a 1.10 g sample requires 31.4 ml of HCl (of which 1.00 ml ≈ 0.0140 g CaO, 56 g/mol). With phenolphthalein, the same weight of sample requires 13.3 ml of the acid. Calculate the percentage of inert matter in the sample.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 58P
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A sample is known is known to consist of NaOH (40 g/mol) or NaHCO3 (84 g/mol), or Na2CO3 (106 g/mol) or possible compatible mixtures of these, together with inert matter. With methyl orange, a 1.10 g sample requires 31.4 ml of HCl (of which 1.00 ml ≈ 0.0140 g CaO, 56 g/mol). With phenolphthalein, the same weight of sample requires 13.3 ml of the acid. Calculate the percentage of inert matter in the sample.
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