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Barium titanate, a ceramic used in electronics, was analyzed by the following procedure: Into a Pt crucible was placed 1.2 g of Na₂CO3 and 0.8 g of Na₂B4O, plus 0.3124 g of unknown. After fusion at 1000°C in a furnace for 30 min, the cooled solid was extracted with 50 mL of 6 M HCl, transferred to a 100-mL volumetric flask, and diluted to the mark. A 25.00-mL aliquot was treated with 5 mL of 15% tartaric acid (which complexes Ti4+ and keeps it in aqueous solution) and 25 mL of ammonia buffer, pH 9.5. The solution was treated with organic reagents that complex Ba²+, and the Ba complex was extracted into CCl4. After acidification (to release the Ba²+ from its organic complex), the Ba²+ was back-extracted into 0.1 M HCl. The final aqueous sample was treated with ammonia buffer and methylthymol blue (a metal ion indicator) and titrated with 32.42 mL of 0.01376 M EDTA. Find the weight percent of Ba in the ceramic. weight percent of Ba: wt%

Barium titanate, a ceramic used in electronics, was analyzed by the following procedure: Into a Pt crucible was placed 1.2 g of Na₂CO3 and 0.8 g of Na₂B4O, plus 0.3124 g of unknown. After fusion at 1000°C in a furnace for 30 min, the cooled solid was extracted with 50 mL of 6 M HCl, transferred to a 100-mL volumetric flask, and diluted to the mark. A 25.00-mL aliquot was treated with 5 mL of 15% tartaric acid (which complexes Ti4+ and keeps it in aqueous solution) and 25 mL of ammonia buffer, pH 9.5. The solution was treated with organic reagents that complex Ba²+, and the Ba complex was extracted into CCl4. After acidification (to release the Ba²+ from its organic complex), the Ba²+ was back-extracted into 0.1 M HCl. The final aqueous sample was treated with ammonia buffer and methylthymol blue (a metal ion indicator) and titrated with 32.42 mL of 0.01376 M EDTA. Find the weight percent of Ba in the ceramic. weight percent of Ba: wt%

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Barium titanate, a ceramic used in electronics, was analyzed by the following procedure: Into a Pt crucible was placed 1.2 g of Na₂CO3 and 0.8 g of Na₂BO7 plus 0.3124 g of unknown. After fusion at 1000°C in a furnace for 30 min, the cooled solid was extracted with 50 mL of 6 M HCl, transferred to a 100-mL volumetric flask, and diluted to the mark. A 25.00-mL aliquot was treated with 5 mL of 15% tartaric acid (which complexes Ti4+ and keeps it in aqueous solution) and 25 mL of ammonia buffer, pH 9.5. The solution was treated with organic reagents that complex Ba²+, and the Ba complex was extracted into CC14. After acidification (to release the Ba²+ from its organic complex), the Ba²+ was back-extracted into 0.1 M HC1. The final aqueous sample was treated with ammonia buffer and methylthymol blue (a metal ion indicator) and titrated with 32.42 mL of 0.01376 M EDTA. Find the weight percent of Ba in the ceramic. weight percent of Ba: wt%
Transcribed Image Text:Barium titanate, a ceramic used in electronics, was analyzed by the following procedure: Into a Pt crucible was placed 1.2 g of Na₂CO3 and 0.8 g of Na₂BO7 plus 0.3124 g of unknown. After fusion at 1000°C in a furnace for 30 min, the cooled solid was extracted with 50 mL of 6 M HCl, transferred to a 100-mL volumetric flask, and diluted to the mark. A 25.00-mL aliquot was treated with 5 mL of 15% tartaric acid (which complexes Ti4+ and keeps it in aqueous solution) and 25 mL of ammonia buffer, pH 9.5. The solution was treated with organic reagents that complex Ba²+, and the Ba complex was extracted into CC14. After acidification (to release the Ba²+ from its organic complex), the Ba²+ was back-extracted into 0.1 M HC1. The final aqueous sample was treated with ammonia buffer and methylthymol blue (a metal ion indicator) and titrated with 32.42 mL of 0.01376 M EDTA. Find the weight percent of Ba in the ceramic. weight percent of Ba: wt%
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