ame ____________________________________CHM 151 Pre-lab Preparation WorksheetDr. Anthony Warren Ph.D.Pre-labwrite-upwascompletedas requiredPropersplashgogglesavailableas requiredSeparation of a Three Component Mixture1) (2) What pages in your lab manual covers this experiment? page _______ through page _______2) (1) Calculate the molar mass of ammonium chloride and enter your answer here: _____________3) (1) Calculate the molar mass of sodium chloride and enter your answer here: ________________4) (1) Calculate the molar mass of silicon dioxide and enter your answer here: _________________5) (2) Solid moth balls seem to disappear over time but are never seen to form a puddle and evaporate.They are also quite fragrant and produce a strong distinctive odor. How do you explain each ofthese two observations?6) (2) When ammonium chloride sublimes what compounds are produced?1 7) (5) A clean dry evaporating dish is weighed on the balance to be 20.6598 g. A scoop of a mixturecontaining NH4Cl NaCl and SiO2 is added to the dish and the dish is reweighed to be 23.5623 g.The dish and its contents are heated at 400 oC until the emission of white fumes ceases and themixture no longer has a yellow color. After cooling the dish and its contents have a mass of22.1364 g. How many grams of ammonium chloride were present in the original sample? (Showall Work Circle Final Answer!)8) (2) Based on the results from question 7) what percent of the mixture is ammonium chloride?(Show all Work Circle Final Answer!)9) (2) What is the name of the chemical used to separate sodium chloride from sand in yourexperiment?10) (2) Why is it important to use deionized water (as opposed to tap water) for your final extraction inthis experiment? Be very specific.2
