The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2Note 403 — Chapter XI · THE COPPER AND SILVER GROUPS. PRECIPITATION WITH HYDROGEN SULPHIDEReading edition[S2−] = 1.1E−23 / [H+]2, according to equation (IV), p. 201.◇Copy noteReturn to CHAPTER XI THE COPPER AND SILVER GROUPS. PRECIPITATION WITH HYDROGEN SULPHIDE