[jsp07001]

I just finished a titration Lab where we tested the antacid effectiveness of different heart burn type tablets. After adding HCL to a crushed base (antacid) we then heated the solution to drive off any CO2 gas and then the solution is titrated using an NaOH base to find the amount of acid that the antacid didn't neutralize. My question is why do you need to drive off the CO2 gas? What would happen if you didn't and how would it affect if at all the experiment results?

[Borek]

Hint: CO₂ is acid anhydride.

[jsp07001]

We have not covered that.

[Borek]

Hint: acid anhydride reacts with water making an acid.

I am almost sure you have covered that, could be it was not named this way.

In general "we have not covered that" is a lame excuse. Two days ago women started labor in the taxi cab not far from the place I live. I can assure you taxi driver has not "covered that" in any school, but he has helped her - and both she and her daughter are OK. You just have to think on your own.

[jsp07001]

Oh so the additional acid would throw the titration off because there would be more acid for the NaOH to neutralize... I get it, yea sorry I was just thrown off by the anhydride. Thanks for the help.