23 of 41 Thiosulfate analysis of copper ore samples Thiosulfate solutions are us

Question

23 of 41 Thiosulfate analysis of copper ore samples Thiosulfate solutions are used in iodometric procedures lodometric procedures use an iodide solution, I (aq), to reduce an analyte, such as copper 2Cu (aq) + (a)2Cul(s) +Is (aq) I, (aq) + 2S20. (aq) S,0 (a)+3 (aq) ore The resulting Is solution is then titrated with a standard solution of NagS2 O By keeping track of the amount of thiosulfate added you can determine the amount of copper present in the ore. Part C A mass of 0 2576 g of ore was dissolved in I (aq). The resulting solution required 17 98 mL of 0.01043 M NaS2Os for complete titration What is the percentage of copper in the ore? Express your answer to four significant figures and include the appropriate units. View Available Hint(s) Value its Submit 04 ??

Explanation / Answer

Mole= 0.01043M*0.01798L

=1.875*10^-5 mole

Molar mass of cu=63.546g/mol

1.875*10^-5*63.546=0.0119 g cu

PercanPerc of ore= (0.0119/0.2576)*100=4.619%

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