Suppose that a student is determining the total base content of an antacid tablet by performing a back titration. He/she weighs out a 0.3012 g portion of a tablet whose total weight is 1.5312 g, dissolves this in exactly 40.00 mL of deionized water, and then adds exactly 30.00 mL of 0.1000M HCl in order to bring the pH down to 1.9. This solution is then carefully back-titrated with 0.2000M NaOH, with 12.50 mL required to reach the equivalence point. Calculate the total base content (i.e., the number of mmoles of base contained) of the antacid tablet. (Formula weight of HCL = 36.46 g/m; formula weight of NaOH= 40.00 g/m)   ​​A) 0.500 mmoles​​D) 8.90 mmoles ​​B) 1.75 mmoles​​​E) none of the above ​​C) 2.54 mmoles​

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A: The detail solution is given below

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.