2. A Pb2 solution of unknown concentration gives a diffusion current of 5.2 μA. To 100 ml of this solution, 50 ml of 0.004 M Pb2 solution was added and the polarogram was recorded again. In this case, the diffusion current was 15 μA. Calculate the concentration of lead in the original solution.

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