4. A 550 mg sample containing aluminum was dissolved and 50.0 ml of 0.045 M EDTA was added. To titrate the excess of the latter, 14.4 ml of a 0.048 M standard solution of Zn2 was required. Calculate the mass fraction of aluminum in the sample.

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