Laboratory Questions (edited)Put answers on a separate piece of paper and provide enough room for instructor comments.1. Based on the procedure of this experiment, explain the effect of the following actions on theassessed masses of the components indicated. Where indicated, also address the effect on thepercent recovery (Part D of the experiment). The choices include: lower, higher, no effect orcould be higher or lower. If the answer could be higher or lower, provide a detailedexplanation.a) Sublimation of NH4CI was not complete. How does this situation affect the calculatedmass of NH4CI and the percent recovery?b) While decanting, some of the salty water was spilled onto the lab bench. How does thissituation affect the calculated mass of NaCl and the percent recovery?c) While decanting, some of the sand was inadvertently transferred to the secondevaporating dish. How does this situation affect the masses of NaCl and sand (SiO2) andthe percent recovery?d) While weighing the first evaporating dish after subliming the NH4CI, the balance was notproperly set to zero prior to the measurement. How does this situation affect thecalculated mass of NH4CI?e) While drying the NaCl, some of the solution splashed onto the watch glass causing salt todeposit on the watch glass. How does this situation affect the calculated mass of NaCl?D While drying the sand, formation of steam caused some the sand to eject out of thecontainer and onto the lab bench. How does this situation affect the calculated mass ofSiO2 and the percent recovery?2. Could the separation in this experiment have been done in a different order? For example, ifthe mixture was first extracted with water and then the extract and the insoluble residue bothheated to dryness, could you determine the amounts of NaCl, NH.Cl, and SiO2 originallypresent? Note that both NaCI and NH4CI are soluble in water. Based on the interpretation,there could be more than one correct answer. Your answer should be justified with a detailedexplanation.87

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Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter5: Resonance

Section: Chapter Questions

Problem 18E

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