127. Задачка по химии №012 7763

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.

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