A human patient suffering from a duodenal ulcer may show a concentration of HCl of 80 × 10−3 molar i

Question

A human patient suffering from a duodenal ulcer may show a concentration of HCl of 80 × 10−3 molar in gastric juice. If his stomach receives 3 L of gastric juice per day, how much medicine (antacid syrup) containing 2.6 g of Al(OH)3 per 100 ml must he consumes per day to neutralize the acid?

Accepted Answer

3HCl + Al(OH)3 → AlCl3 + 3H2O3 mole 78 g∴3 × 80 × 10−3 mole $\frac{78}{3} 	imes 3 	imes 80 	imes 10^{- 3}$ = 7.8 × 0.8 g∴ Volume of antacid syrup needed = $\frac{100}{2.6} 	imes (7.8 	imes 0.8)$= 240 mL

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