221. The solution contains 0.1 g-ion/l Cd(CN)42-, 0.1 g-ion/l Cu(CN)43- and 0.05 mol/l KCN. When passing hydrogen sulfide, a concentration of sulfide ion was created equal to 10-13 g-ion/l. Will precipitation of CU2S and CdS occur.
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
No feedback yet