6.55. To determine lithium, a sample of silicate rock weighing 0.9542 g was treated with a mixture of HF and HCl. After extracting lithium chloride with anhydrous acetone, the solution was evaporated, the residue was calcined and converted into Li2SO4, the mass of which was 0.3416 g. Calculate the mass fraction (%) of lithium in the silicate rock.

Read the product description. After payment, the system will redirect you to a page with a ready-made solution to problem 6.55 from the collection: Vasilyev V.P. Analytical chemistry. Collection of questions, exercises and tasks: a manual for universities / V.P. Vasiliev, L.A. Kochergina, T.D. Orlova; edited by V.P. Vasilyeva. – 4th ed., stereotype. – M.: Bustard, 2006. – 318, [2] p.: ill. The solution is a document formatted in MS Word.
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