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The relationship between acid and bicarbonate is that 1 H+ neutralizes 1 bicarbonate (HCO3) molecule as represented in the following equation:
HCl + NaHCO3 --> NaCl + H2CO3
So assuming that the stomach has a pH of 3 and a volume of 100 ml (see table 1, HS = Health Subject, mean vol = 133 ml). A pH of 3 means a concentration of H+ ions of 0.001 mol/l (conc ...
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