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Gastric juice contains 3.0g of HCl per litre.If a person produces 2.5l of gastric juice per day,how many antacid tablets each containing 400mg of $Al(OH)_3$ are needed to neutralized all the HCl produced in one day ?


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$N_{HCl}$ in gastric juice $=\large\frac{3}{36.5}$
Meq of HCl =$\large\frac{3}{36.5}$$\times 2500$
$\Rightarrow 205.48$
$\large\frac{w}{78/3}$$\times 1000=205.48$
No of tablets $Al(OH)_3=\large\frac{5342}{400}$
$\Rightarrow 13.34$
$\Rightarrow \approx 14$(approx)
Hence (b) is the correct answer.
answered Nov 6, 2013 by sreemathi.v

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