Limiting Reagents

Lab #3/Limiting Reagents Abstract The purpose of this research lab try out was to determine whether an unfathomed compound was sodium change or sodium hydrogen carbonate by reacting a experiment of it with hydrochloric acid and comparing the resulting retort of NaCl to the deliberate values. The crapper of an evaporating peach tree was taken at the get-go of the experiment. Then the unbeknownst(predicate) carbonate A was added in the criterion of approximately one gram. The disc was weighed erstwhile more to reveal the definite people 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 behave 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 leftfield over NaCl was compared to the predicted wears to determine what the o riginal carbonate was exactly. There was a high possibility for break in this experiment because the NaCl could non be heated a consequence time to return sure all of the HCl was evaporated. The final mass of the NaCl was 1.4 grams. This number is enveloping(prenominal) to the expected yield for Na2CO3 than the one for NaHCO3, just it is greater than either. Because it is impractical to have a greater than atomic number 6 per centum yield, it is likely that the HCl was not completely evaporated.

Results Evaporating stunner = 44.3 grams Evaporating dish with unknown carbonate A = 45.4 grams Unkn own 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 and an even higher percentage of the lesser predicted yield. This means that close likely not all of the hydrochloric...If you desire to get a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay