Chemistry 3 0.0 / 5 ? ChemistryChemistryUniversityAll boards Created by: sophieridgeCreated on: 19-04-18 15:07 What is pH? A measure of free hydrogen ions, not those bound to anions. 1 of 8 What is the blood pH? 7.35-7.45 2 of 8 Where is most acids in the body produced? By the breakdown of proteins, incomplete oxidation of fats or glucose. 3 of 8 What is the pH where weak acid/bases is the buffer? When it is 50% associated and 50% dissociated. On a graph when the line is flat it is buffering. 4 of 8 Define pH pH= pKa+log(conjugate base/acid). when equal associated and dissociation pH=pKa 5 of 8 What acid is the buffer in urine? phosphoric acid. 6 of 8 What is the only aa that acts a buffer? Histidine as it has a pKa side chain of 6. Only acidic and basic ones have potential to be buffers. 7 of 8 Why is haemoglobin a good buffer? It has lots of histidine. oxyhaem pKa 6.8 deoxyhaem 7.8. deoxy is a better buffer for H+ produced in metabolism. 8 of 8
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