To 5 l of a 15% solution of H3PO4 with a density of 1.114 g/ml, 5 l of an 8% solution of the same acid with a density of 1.206 g/ml was added. Calculate the percentage mass fraction and molar concentration of the resulting solution, the volume of which is 10 liters.

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.