Which statement about ammonium sulfate is not correct?
It reacts with Ba(NO3)2(aq)\text{Ba(NO}_3)_2\text{(aq)}Ba(NO3)2(aq) to form a white precipitate.
It can be prepared by reacting dilute sulfuric acid with aqueous ammonia.
It releases an alkaline gas with warm NaOH(aq)\text{NaOH(aq)}NaOH(aq).
It has the formula NH4SO4\text{NH}_4\text{SO}_4NH4SO4.
