[Kyoma]

In an accident at a factory, some nitric acid was split.

Which substance then, when added in excess, would be the best chemical to neutralise the acid without leaving an alkaline solution?

Calcium carbonate or sodium carbonate?

I picked sodium carbonate but calcium carbonate is the best choice. Why? Is it got to do with it being insoluble in water?

[Borek]

You already asked this question at Physics Forums, you were given hints, but instead of trying to understand what they mean, you ask the question here hoping someone will do your work. It won't work.