GENERAL QUESTIONS VII 241- What is an ammoniate? Give the formulas of the ammonio
ions of copper, silver, zinc, and cadmium. How can crystallized
ammonio-copper sulphate be prepared? How would you make a
solution of ammonio-copper hydroxide? What is the alkaline
strength of such a solution? - Discuss the tendency of the heavy metals of Groups I and II
to enter complex negative ions; give several examples, at least one
for each metal, also examples in which the simple cyanide, thio-
cyanate, iodide, and chloride ions are involved. Describe experi-
mental facts to illustrate the great stability of potassium argenti-
cyanide, KAg(CN) 2 , and the instability of sodium argentichloride,
NaAgCl 2. - Compare the metals of this chapter among themselves with
regard to their position in the electromotive series, also with the
metals of the A families of Groups I and II, and with aluminum.