- A silicate ore contains 12.00% Na,0 and weighs 0.5000 gram. On analysis by the J.L. Smith method, the sample yielded 0.1500 g of a mixture of Nad + KA. What weight of KPtCl, was obtained from the mixture of chlorides?

- A silicate ore contains 12.00% Na,0 and weighs 0.5000 gram. On analysis by the J.L. Smith method, the sample yielded 0.1500 g of a mixture of Nad + KA. What weight of KPtCl, was obtained from the mixture of chlorides?

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter37: Qualitative Analysis Of Group Ii Cations

Section: Chapter Questions

Problem 2ASA

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A sílicate ore contains 12.00% Na,0 and weighs 0.5000 gram. On analysis by the J.L. Smith method, the sample yielded 0.1500 g of a mixture of NaCl + KA. What weight of K2PtCl, was obtained from the mixture of chlorides?
1. A 0.9882 gram sample of iron ore is dissolved, the iron reduced to Fe2+, and the solution was titrated with 36.40 mL of 0.02065 M KMnO4 in acid solution. (a) Write the titration reaction. (b) Calculate the %FeO (M.M. = 71.85) in the sample. 2. A sample of primary standard grade K2Cr2O7 (MM = 294.20) weighing 0.2153 g is dissolved, the solution acidified and excess KI added. The liberated I2 requires 44.86 mL of the Na2S2O3 for titration. (a) Write the titration reaction. (b) Calculate the molarity of the titrant solution. Box the final answer.
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(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000 g is treated with a 0.6000 g of pure H2C2O4.2H20 and dilute H2SO4 and after reduction has taken place (MnO2 + H2C2O4 + 2H+ Mn2+ + 2CO2 + 2H2O), the excess oxalic acid requires 26.26 mL of 0.1000 N KMNO4 for titration? (b) If pure As2O3 were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?
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