Brand of antacid cost of antacid: $ per tablets concentration of HCI solution. M

Question

Brand of antacid cost of antacid: $ per tablets concentration of HCI solution. M concentration of NaOH solution, M mass of weighing dish and tablet, g mass of weighing dish, g mass of tablet, g final buret reading. mL initial buret reading, mL volume of titrant, mL number of moles of HCI added, mol number of moles of NaOH required, mol number of moles of HCI neutralized per tablet, mol average number of moles of HCI neutralized per tablet, mol number of moles of HCI neutralized per gram of tablet, mol average number of moles of HCI neutralized per gram of tablet, mol

Explanation / Answer

total moles HCl added = 25 moles HCl added

moles NaOH added to titrate excess HCl (the amount that did not react with the antacid tablet)
= 4 moles NaOH

Since NaOH and HCl react in a 1:1 mole ratio, then moles HCl in excess = moles NaOH = 4 moles HCl.

Moles of HCl reacted with antacid tablet = Total moles HCl added - moles of HCl in excess
= 25 - 4 = 21 moles HCl reacted with tablet.

21 moles HCl / 1.309 g tablet = 16.04 g HCl / 1 g tablet

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