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PAG 12.1 - Investigating Iron content in Iron tablets, supplements - Research with sources + comprehensive method £4.49
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PAG 12.1 - Investigating Iron content in Iron tablets, supplements - Research with sources + comprehensive method

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Detailed PAG 12.1 research and method notes. Investigating the amount of Iron in iron tablets using titration using potassium manganate (VII) solution. The notes include a research section outlining why iron is vital to correct functioning

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  • July 11, 2019
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  • 2018/2019
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PAG 12.1 – Investigation iron tablets NAME




Research

Most iron tablets contain the following 1:

 Ferrous Sulphate (active ingredient). Most tablets contain 200mg of ferrous sulphate, which
its equivalent to 65mg of elemental iron.
 Maize starch
 Maltodextrin
 Calcium stearate
 E124 (red dye)

Iron is vital to the human body as it is the main component of haemoglogin, which is a protein in red
blood cells2. Due to the high reactivity of iron (II), oxygen temporarily binds onto it and gets carried
around the body until it is released at areas with a low concentration of oxygen.

People who are anaemic need to take iron supplements to promote the production of healthy red
blood cells. Pregnant women and people with inadequate amounts of iron in their diet are at higher
risk of developing anaemia3. The recommended daily iron intake is 8mg for men and women over 50
and 18mg for women aged 19-50.

The experiment below will allow the researcher to determine the concentration of iron (II) in a
sample solution made from a crushed up iron tablet dissolved in dilute sulphuric acid. The reaction
can be summarised by this equation:

MnO4- + 8H+ + 5Fe+2  Mn+2 + 5Fe+3 + 4H2O




Method – titration using potassium manganate (VII) solution

Equipment

4 Iron tablets

0.1 M sulfuric acid solution

Electronic scale

Mortar and pestle

Filter funnel

Volumetric flask

6x 50cm3 beakers


1
http://www.mhra.gov.uk/home/groups/par/documents/websiteresources/con125980.pdf [last accessed
31.01.19]
2
Epstein, F. H.; Hsia, C. C. W. (1998). "Respiratory Function of Hemoglobin". New England Journal of
Medicine. 338 (4): 239–47.
3
https://www.nhlbi.nih.gov/health-topics/anemia [last accessed 31.01.19]

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