A 1.219-g sample containing (NH4)2SO4, NH4NO3, and nonreactive substances
was diluted to 200 mL in a volumetric flask. A 50.00-mL aliquot was made basic with strong alkali, and
the liberated NH3 was distilled into 30.00 mL of 0.08421 M HCl. The excess HCl required 10.17 mL of
0.08802 M NaOH for neutralization. A 25.00-mL aliquot of the sample was made alkaline after the
addition of Devarda’s alloy, and the NO3- was reduced to NH3. The NH3 from both NH4+ and NO3- was
then distilled into 30.00 mL of the standard acid and back-titrated with 14.16 mL of the base. Calculate
the percentage of (NH4)2SO4 and NH4NO3 in the sample.
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