(a) A 0.1527-g sample of primary-standard AgNO3 was dissolved in 502.3 g of distilled water. Calculate the weight molar concentration of Ag+ in this solution.
(b) The standard solution described in part (a) was used to titrate a 25.171-g sample of a KSCN solution. An end point was obtained after adding 24.615 g of the AgNO3 solution. Calculate the weight molar concentration of the KSCN solution.
(c) The solutions described in parts (a) and (b) were used to determine the BaCl2 • 2H2O in a 0.7120-g sample. A 20.102-g sample of the AgNO3 was added to a solution of the sample, and the excess AgNO3 was back-titrated with 7.543 g of the KSCN solution. Calculate the percent BaCl2 • 2H2O in the sample.
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