7 Mole Relationships - Faculty.chemeketa.edu

II. Examination of ResidueComplete the equation for the reaction of silver nitrate with potassium chloride:____AgNO 3(aq) + ____KCl (s) Known KClO 3 Known KCl Residuefrom your experimentObservationsafter addition of silvernitrate (AgNO 3 )Results: From your observations the identity of the residue left behind in the crucible is _____________________Explanation/Analysis: Did your experimental results indicate the expected results for the identity of the residue? Explain.Error Analysis: What specific experimental errors might cause a student to incorrectly identify the residue?Related Exercises:1. You suspect your dinner companion has salted your water. Without tasting it you take a sample to thelab. What could you do to test for the presence of table salt? Be specific about what you’d do and whatyou’d look for.2. Butane, C 4 H 10 , is a common fuel found in lighters. When butane burns it combines with oxygen toproduce carbon dioxide and water. A student burned a 5.00 gram sample of butane. Follow theinstructions below and enter the results into the table at the end:Be careful to keep the appropriate number of significant figures. Do not round off too soon.A. Correctly balance the equation given for the complete combustion of butane. Enter it also intorow A of the table below.___C 4 H 10 + ___O 2 ____CO 2 + ____H 2 OB. Determine the molar mass (formula weights) for each reactant and product to at least 2 placesbehind the decimal and enter into cells B1-B4.C. Determine the number of moles of butane in 5.00 grams of butane. (Box C1) (Show calculations here.Report to correct significant figures)D. Determine the number of moles of oxygen that will react with 5.00 grams of butane. (Box C2)(Show calculations here. Report to correct significant figures)100CH104 Lab 7: Mole Relationships (F14)