General Chemistry 1 Final - Part 3 of 3
SAMPLE
Please be aware that you practice a sample exam set, which means that it’s mimicking a real exam. In order to have more accurate experience:
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14. Solutions / Solutions: Mass Percent / Problem 18
Hydrochloric acid is used to neutralize the ammonia produced from a Kjeldahl method where all nitrogen organic substances are converted to ammonia. In a 4.37 g sample of organic material, 23.0 mL of 0.280 M HCl (aq) was used up. Determine the mass percentage of nitrogen in the sample.
NH3(aq) + HCl(aq) → NH4Cl(aq)
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