Iodometric analysis of high-temperature superconductor. The procedure in Box 15-3 was carried out to find the effective
Question:
(a) In Experiment A of Box 15-3, 1.00 g of superconductor required 4.55 mmol of S2O3-. In Experiment B, 1.00 g of superconductor required 5.68 mmol of S2O32-. Calculate the value of z in the formula YBa2Cu3O7 - z (FM 666.246 - 15.999 4z).
(b) In several replications of Experiment A, the thiosulfate required was 4.55 ( 0.10) mmol of S2O23- per gram of YBa2Cu3O7 - z. In Experiment B, the thiosulfate required was 5.68 ( 0.05) mmol of S2O32- per gram. Calculate the uncertainty of x in the formula YBa2Cu3Ox.
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a b YBa2Cu3CO7 contains 1 Cu and 2 Cu YBa2Cu3065 contains no Cu3 and 3 Cu ...View the full answer
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