Can i use ammonium hydroxide instead of ammonia?

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Paul Milham

They are one and the same

Carlos Araújo Queiroz

We can retrieve densities of ammonia (aq. sol.) from (e.g.) Table 2-32, in: R.H. Perry, D.W. Green, J.O. Maloney (Eds.), "Perry's Chemical Engineers’ Handbook", 7th ed., McGraw-Hill, 1997.

For ammonia (aq. sol.) of label concentration 25 wt% as NH3 (approximate) at 20 ºC; ρ = 0.907 g/cm3 (interpolated). The molecular mass of NH3 is 17.03 g/mol. Hence, the molarity in terms of NH3 would be: 0.25(g NH3 / g aq. sol.)·0.907(g aq. sol./cm3)·(1000 cm3/dm3)/(17.03 g NH3/mol NH3) = 13.3 M as NH3 (approximate).