The latest experiment that was organized by our students was the investigating iron tablets. Haemoglobin, in red blood cells, has haem groups containing Iron, which bond to oxygen and transport it around the body. When there is a lack of iron in the organism (iron deficiency) it can cause serious problems as oxygen intake decreases. This is called Anaemia. People with it use Iron tablets to treat themselves and prevent the dangerous consequences of the disease. The photo represents titration using acidified potassium manganite [VII] carried by Danny T. (Bulgaria) to measure the amount of iron in the tablets