Note 454 — Chapter XII · THE COPPER AND SILVER GROUPS (Continued).—THE THEORY OF COMPLEX IONS
Reading edition
Put [Cu+] = x, and [CN−] = 3 x, and, neglecting the degree of ionization, [Cu(CN)32−] = 0.1, x being so small that it need not be subtracted from 0.1. Then x × (3 x)3 = 0.1 × 0.5E−27, and x = 3.7E−8.