[zerobladex]

I'm calculating the Ksp of calcium hydroxide for a lab using two different methods:
Titrations and using an electronic pH meter

I just had a few questions I was hooping someone could answer.

How does the reaction of between calcium hydroxide and carbon dioxide, which forms calcium carbonate increase the percentage error in the lab?

[nj_bartel]

Are you sure you don't mean carbonic acid?  Carbonic acid forms when CO₂ reacts with water.

[Rabn]

Have you written out your system of equations?

[Borek]

Are you sure you don't mean carbonic acid?  Carbonic acid forms when CO₂ reacts with water.

No matter how you will treat the mechansim, final effect (in terms of equivalents of CO₂ reacting with Ca(OH)₂) will be exactly the same.

[nj_bartel]

Oh, that makes sense.  Guess it was just easier for me to see it in terms of acid/base.