CuI, CuSCN Solubility in Ammonia Solution
The reason these salts are soluble in ammonia (including aqueous ammonia -- so why buy ammonia in EtOH?) is that they form complexes with ammonia:
$$
\ce{CuI}\text{(s)}+2\ce{NH3}\text{(aq)}\to\ce{Cu(NH3)_2^+}\text{(aq)}+\ce{I-}\text{(aq)}.$$
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