2. Volumetric Analysis for Ammonia, NH3.
The amount of ammonia in your compound will be determined by a conventional
acid-base titration. That is, using the reaction
y NH3(aq) + y H+(aq) → y NH4
+(aq)
where H+ is from a standardized solution of strong acid, that is, from HCl.
1. Weigh out to the nearest milligram two 1 gram samples of your compound,
and dissolve each in about 30 mL of water. (Do not allow the solutions to
stand very long before titrating them.)
2. Add 10 drops of methyl orange indicator to each solution, and titrate
each with thorough stirring with standard HCl. (The acid concentration is
approximately 0.5 M; the exact concentration will be given to you.)
3.
Record your results for each titration on your report form. Check the precision
of your results by dividing the volume of acid used by the sample
weight; if the two runs do not agree within 1%, do another determination.
2. Volumetric Analysis for Ammonia, NH3.
The amount of ammonia in your compound will be determined by a conventional
acid-base titration. That is, using the reaction
y NH3(aq) + y H+(aq) → y NH4
+(aq)
where H+ is from a standardized solution of strong acid, that is, from HCl.
1. Weigh out to the nearest milligram two 1 gram samples of your compound,
and dissolve each in about 30 mL of water. (Do not allow the solutions to
stand very long before titrating them.)
2. Add 10 drops of methyl orange indicator to each solution, and titrate
each with thorough stirring with standard HCl. (The acid concentration is
approximately 0.5 M; the exact concentration will be given to you.)
3.
Record your results for each titration on your report form. Check the precision
of your results by dividing the volume of acid used by the sample
weight; if the two runs do not agree within 1%, do another determination.
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