(b) Iron is an important component of haemoglobin, the protein that transports oxygen around the body....

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(b) Iron is an important component of haemoglobin, the protein that transports oxygen around the body. Persons who are anaemic can take iron supplements to increase the concentration of iron in the body. Iron in iron supplements can be analyzed by atomic or molecular absorption spectroscopy, the latter involves complexation with an organic compound. (i) Draw annotated diagrams of the expected atomic and molecular absorption spectra of iron accounting for their shapes. [5 marks] (ii) An iron supplement was analysed for its iron content by FAAS. The procedure was as follows: 5.48g of crushed tablet was digested in conc. HNO3 for 2h. The resultant mixture was filtered and diluted to 50 ml. A 10.00 ml aliquot was transferred to another 50.0ml volumetric flask and made up to the mark with distilled water. The iron supplement gave a signal of 0.43. Use the graph below to find the concentration of iron in the supplement as mg Felg tablet. [7 marks] Signal 1 0.8 0.6 0.4 0.2 5 20 15 Concentration of Fe (mg/L) 10 25 30 PLEASE TURN TO THE NEXT PAGE (b) Iron is an important component of haemoglobin, the protein that transports oxygen around the body. Persons who are anaemic can take iron supplements to increase the concentration of iron in the body. Iron in iron supplements can be analyzed by atomic or molecular absorption spectroscopy, the latter involves complexation with an organic compound. (i) Draw annotated diagrams of the expected atomic and molecular absorption spectra of iron accounting for their shapes. [5 marks] (ii) An iron supplement was analysed for its iron content by FAAS. The procedure was as follows: 5.48g of crushed tablet was digested in conc. HNO3 for 2h. The resultant mixture was filtered and diluted to 50 ml. A 10.00 ml aliquot was transferred to another 50.0ml volumetric flask and made up to the mark with distilled water. The iron supplement gave a signal of 0.43. Use the graph below to find the concentration of iron in the supplement as mg Felg tablet. [7 marks] Signal 1 0.8 0.6 0.4 0.2 5 20 15 Concentration of Fe (mg/L) 10 25 30 PLEASE TURN TO THE NEXT PAGE (b) Iron is an important component of haemoglobin, the protein that transports oxygen around the body. Persons who are anaemic can take iron supplements to increase the concentration of iron in the body. Iron in iron supplements can be analyzed by atomic or molecular absorption spectroscopy, the latter involves complexation with an organic compound. (i) Draw annotated diagrams of the expected atomic and molecular absorption spectra of iron accounting for their shapes. [5 marks] (ii) An iron supplement was analysed for its iron content by FAAS. The procedure was as follows: 5.48g of crushed tablet was digested in conc. HNO3 for 2h. The resultant mixture was filtered and diluted to 50 ml. A 10.00 ml aliquot was transferred to another 50.0ml volumetric flask and made up to the mark with distilled water. The iron supplement gave a signal of 0.43. Use the graph below to find the concentration of iron in the supplement as mg Felg tablet. [7 marks] Signal 1 0.8 0.6 0.4 0.2 5 20 15 Concentration of Fe (mg/L) 10 25 30 PLEASE TURN TO THE NEXT PAGE

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Solution i Atomic and molecular absorption spectra ... View the full answer