SIM – Plate 4

Iron sulphate, Silver Nitrate, Lead Nitrate

As a further proof of the difference between a day and night experiment, another example is given with a mixture of Silver nitrate, Iron sulphate and Lead nitrate. Three substances are brought into play; two of them nitrates and one a sulphate. Again the chemical reaction can be observed, the deposit is formed, after these three substances are mixed in 1% solutions and equal quantities. It must be mentioned, although we do not wish to press this point further here, that it makes a difference if the mixture is made so that the two nitrates are mixed first, and then the sulphate is added; or Silver nitrate is added to Iron sulphate, the chemical reaction is allowed to pass, and then the Lead nitrate is added; or Lead nitrate is added to Iron sulphate, the chemical reaction sets in and then we add Silver nitrate.