1. For the titration of 20.00 ml of water in the presence of an ammonium buffer solution and eriochrome black T, 19.20 ml of 0.0500 mol/l complexone III was used. After addition of NaOH solution and 12.38 ml of the same solution of complexone III to the same portion of water, 12.15 ml of 0.04850 mol/l CaCl2 solution was used for titration of excess complexone III in the presence of murexide. Find the molar concentrations of Ca2 and Mg2 in water.

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