33. Solving a chemistry problem

1. Specific electrical conductivity of 0.135 mol/l aqueous solution of propionic acid (С2Н5СООН) is 4.79·10-4 Ohm-1·cm-1. Assuming that the density of the solution is 1 g/cm3, determine the pH of this solution. Take the data on the limiting mobilities of ions from the reference book.