In: Chemistry
Sodium hydrogen carbonate NaHCO3, also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid HCl, which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction:
HCl(aq) +NaHCO3(aq) →NaCl(aq) +H2O(l) +CO2(g)
The CO2 gas produced is what makes you burp after drinking the solution. Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 200.mL of a 0.080M HCl solution. What mass of NaHCO3 would he need to ingest to neutralize this much HCl ? Round your answer to 2 significant digits.
Number of moles of HCl in stomach= Molarity of HCl X Volume of HCl solution in L
=0.08 M X 200/1000 L = 0.016 moles
According to the balanced equation of neutralization
For complete neutralization
Number of moles of NaHCO3 = Number of moles of HCl
Therefore number of moles of NaHCO3 required = 0.016 moles
Amount of NaHCO3 required = required no of moles X mw of NaHCO3
= 0.016 mole X 84.007 g/ mole = 1.3 gram Answer