Gastric juice contains 3.0 g of HCl per litre. If a person produces 2.5 L of gastric juices per day, then the amount of antacid tablets each containing 400 mg of Al(OH 3 ) needed to neutralize all the HCl produced in one day is : ANWER WILL BE MARKED THE BRAINLIEST
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The molar masses of HCl and Al(OH)
3
are 36.5 g/mol and 78 g/mol respectively.
In one day, a person produces 2.5 L of gastric juices which contain 2.5×3.0=7.5g of HCl.. This corresponds to
36.5
7.5
=0.20 moles of HCl.
1 mole of Al(OH)
3
will neutralize 3 moles of HCl.
Hence, 0.2 moles of HCl will be neutralized by
3
0.2
=0.068 moles of Al(OH)
3
. This corresponds to 0.068×78=5.34 g of Al(OH)
3
Each antacid tablet contains 400 mg or 0.4 g of Al(OH)
3
. hence, the number of antacid tablet required per day to neutralize HCl are
0.4
5.34
≈14.
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