pH regulation of the stomach answers
1. Al(OH)3 + 3HCl ⟶ AlCl3 + 3H2O Mg(OH)2 + 2HCl ⟶ MgCl2 + 2H2O NaHCO3 + HCl ⟶ NaCl + CO2 + H2O 2. A pH of 2 means that the concentration of the hydrochloric acid is 0.0100 mol dm-3Amount of HCl in 10 cm3 = 10/1000 x 0.0100 = 1.00 x 10-4 molCaCO3 + 2HCl ⟶ CaCl2 + CO2 + H2O1 mole of CaCO3 neutralises 2 mol of HClAmount of CaCO3 required = ½ x 1.00 x 10-4 mol = 5.00 x 10-5 molMr of CaCO3 = 40.08 + 12.01 + (3 x 16.00) =...