58. Solution to Chemistry Problem

Problem 5. The concentration of cadmium in the solution was determined polarographically by the addition method. For a 15 ml solution being analyzed, the height of the polarographic wave was 25 mm. After adding 1 ml of a standard cadmium chloride solution with a concentration of 0.105 mol/l to the solution being analyzed, the height of the wave increased to 30 mm. Calculate the concentration of cadmium in the solution in mol/l.