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Aqueous Stoichiometry

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Can someone give me some directions as to how to reach the answer for this problem:

A 0.608g sample of fertilizer contained nitrogen as ammonium sulfate,
(NH4)2 SO4(s)+2NaOH(aq)-->Na2SO4(aq)+ 2H2O(l)+2NH3(g)

The ammonia was collected in 46.3 mL of 0.213 M HCL (hydrochloric acid), with which it reacted.


This solution was titrated for excess hydrochloric acid with 44.3 mL of 0.128 M NaOH


What is the percentage of nitrogen in the fertilizer?

The answer is 9.66%

  • Aqueous Stoichiometry -

    I get 9.86 something...

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