100. The amount of zinc in the alloy was measured using the polarographic method. A sample of the alloy weighing 0.8120 g was transferred to a 200 ml volumetric flask. Then 50.0 ml of the resulting solution was placed in a 100 ml volumetric flask and made up to the mark with water. When polarographing this solution, a wave with a height of 36 mm was obtained. To polarograph a standard solution, 5.0 ml of a solution containing 0.085 mg/ml Zn was placed in a 100 ml volumetric flask and the solution was diluted to the mark with water. For this solution, a wave with a height of 25 mm was obtained. Calculate the mass fraction of zinc in the alloy.

If the file does not open for you, install the Rar archiver program. Inside the archive, the solution is in WORD format.