at the moment we cannot display this in the IJC gridview. What you can do is the following:
1) double click on the molecule
2) go to calculations -> protonation -> pKa
3) set the options and see the results
You could for example save the result as some image file.
The alternative way is to use molmatrix widget. Currently it is limited to show only one field,
so you can display eg a molecule with strongest acidic pKa. This is probably not what you would prefer,
but it is the solution we have now.
Would an extension like in JChem for Office very important for you? If so, we may consider the implementation in the future.