Various precipitation examples for lead(II)

Chemicals needed

distilled water

lead(II) nitrate GSBRANDF.gif (891 Byte) O GSGiftig.gif (734 Byte) T    R 61-62-8-20/22-33    S 53-17-45

potassium iodide solution

sodium carbonate solution

hydrochloric acid, 7%

sulphuric acid 10%  GSGESUND.gif (476 Byte) Xi   R 36/38    S (1/2)-26-30-45

sulphuric acid potassium dichromate solution GSGiftig.gif (734 Byte) T+ GSATZEND.gif (935 Byte) C GSUMWELT.gif (758 Byte)  N   
R 21-25-26-35-37/38-41-43-46-49-50/53    S (1/2)-26-45-53-60-61

Equipment necessary

5 test tubes

Test procedure


One disposes of all residues as heavy metal waste. The poorly soluble precipitations must perhaps be in part removed mechanically (Caution! Gloves are recommended, otherwise wash the hands thoroughly after cleaning.).


Lead(II) forms many insoluble salts (brown to black sulfide is also of importance), and can therefore be easily verified, even if individual precipitations are not unambiguous.



Precipitations of CrO32-, CO32-, SO42-, Cl- , I (from left to right)


Experiment based on own considerations