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Topic: Stuck on a stoichiometry problem  (Read 1974 times)

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Offline 2617wal

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Stuck on a stoichiometry problem
« on: February 16, 2015, 08:25:01 PM »
Not sure to go about solving this, if someone could explain how to go about this, I would very much appreciate it! Thanks!

A tablet is expected to be 30.8% citric acid (H3C6H5O7) and 10.1%  aspirin. How much citric acid would be required to exactly react with all of the sodium bicarbonate in one Alka-Seltzer tablet?     
hint:  citric acid is triprotic, 3 H+'s  per molecule.  You need to re-balance the reaction equation (original equation: NaHCO3 + HCl --> H2O + CO2 + NaCl ).   
hint: you will need to calculate the average mass of an Alka-Seltzer tablet.

Offline Ciubba

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Re: Stuck on a stoichiometry problem
« Reply #1 on: February 16, 2015, 08:47:32 PM »
Not sure to go about solving this, if someone could explain how to go about this, I would very much appreciate it! Thanks!

A tablet is expected to be 30.8% citric acid (H3C6H5O7) and 10.1%  aspirin. How much citric acid would be required to exactly react with all of the sodium bicarbonate in one Alka-Seltzer tablet?     
hint:  citric acid is triprotic, 3 H+'s  per molecule.  You need to re-balance the reaction equation (original equation: NaHCO3 + HCl --> H2O + CO2 + NaCl ).   
hint: you will need to calculate the average mass of an Alka-Seltzer tablet.
You need to re-balance the reaction equation (original equation: NaHCO3 + HCl --> H2O + CO2 + NaCl ).   

I would recommend starting there-- you really can't do very much without an equation that describes this reaction.

Offline Arkcon

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Re: Stuck on a stoichiometry problem
« Reply #2 on: February 16, 2015, 09:56:33 PM »
And I would start with an equation that actually describes the reaction, HCl is not one of the reactants.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

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