in the equation Ba(NO3)2(aq)+Na2SO4 (aq) →BaSO4(s) + Na2(NO3)2 .......is Na2(NO3)2 aqueous?

Yes, but it should be 2NaNO3

To determine whether Na2(NO3)2 is aqueous or not in the given chemical equation, we need to understand the solubility of different compounds.

In general, nitrates (NO3-) are soluble in water, so NaNO3 (sodium nitrate) is an aqueous compound. However, we need to check if there are any exceptions for certain compounds like Na2(NO3)2.

To do this, you can consult a solubility table or look up the solubility rules for common ionic compounds. According to these rules, all sodium (Na+) compounds are soluble in water, including Na2(NO3)2.

Therefore, in the given equation, Na2(NO3)2 should be written as an aqueous compound.