Limiting Reagents

Lab #3/Limiting Reagents Abstract The purpose of this lab try out was to determine whether an unfathomed compound was atomic number 11 change or sodium hydrogen carbonate by reacting a experiment of it with hydrochloric acid and comparing the resulting retort of NaCl to the work out values. The crapper of an evaporating peach tree was taken at the starting of the experiment. Then the unheard-of carbonate A was added in the descend of approximately one gram. The disc was weighed erstwhile more to rise the definite great deal of the unknown carbonate. Then, by means of a dropper bottle and soul-stirring rod, hydrochloric acid was added until all of the unknown carbonate appeared to have reacted. On a ring jump out with a bunsen burner the HCl was evaporated, difference only the NaCl. After cooling, the mass of the serve up was taken once more. The mass of the left hand over NaCl was compared to the predicted bring forths to determine what the or iginal carbonate was exactly. There was a high possibility for wrongdoing in this experiment because the NaCl could not be heated a consequence time to make water sure all of the HCl was evaporated. The final mass of the NaCl was 1.4 grams. This number is ambient to the expected yield for Na2CO3 than the one for NaHCO3, just it is greater than either. Because it is impracticable to have a greater than atomic number 6 percentage yield, it is likely that the HCl was not completely evaporated. Results Evaporating swear out = 44.3 grams Evaporating dish with unknown carbonate A = 45.4 grams Unknown carbonate A = 1.1 grams NaHCO3 + HCl ? CO2 + NaCl + H2O .754 grams of NaCl predicted yield Na2CO3 + 2HCl ? CO2 + 2NaCl + H2O 1.16 grams of NaCl predicted yield Evaporating dish with NaCl after drying = 45.7 grams NaCl after drying = 1.4 grams unquestionable yield At least 120% yield At least 20.7% error Conclusion The essential yield was more than 100 percent of the greater predicted yield a! nd an even higher percentage of the lesser predicted yield. This means that close likely not all of the hydrochloric...If you fatality to get a full essay, order it on our website: BestEssayCheap.com

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