[biouoc]

what are the precautions for producing (cooh)2 for acidimetry and why are the organic acids better than HCl for acidimetry?
 

[Borek]

what are the precautions for producing (cooh)2 for acidimetry and why are the organic acids better than HCl for acidimetry?
 

Question as asked doesn't make much sense to me. I don't agree with the statement that organic acids are better than HCl. HCl is a perfect, stable titrant, giving nice, steep inflection on the titration curve; that's not the case with organic acids.

[biouoc]

i found that question in a book..i found it silly too...they probably mean the exact oposite...what about the first question?it seems so vague to me,that i cannot understand what is required to answer..

[Borek]

Perhaps they aim at the use of oxalic acid as a standard substance.

[biouoc]

yes thank you!! Do you also know how can we explain the ratio 1:1 when EDTA reacts with metal ions? and whats the aim of adding water without ions in the unknown solution in a titration and how can this affect the results in the end?

[nimbus]

EDTA's 1:1 ratio comes from the chelate effect and gibbs free energy relationships. Look up polydentate in your book.