32. Solving a chemistry problem

32. Solving a chemistry problem

3. A 0.7582 g sample of silicate was dissolved and, after a series of operations, transferred to a volumetric flask with a capacity of 500 cm3. In 100 cm3 of the resulting solution, iron was reduced to Fe(II); 6.7 cm3 of potassium dichromate solution with a titer of 0.00049 was used to titrate this solution. Calculate the mass fraction of iron (III) in the sample.

Additional information:

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