Recitation Worksheet Five Olivia Beavers Name Textbook Chemistry Chemical Reactivity by John C Kotz Paul M Treichel John R Townsend David Treichel 11th Edition Copyright 2024 Instructions UGA ID 0571748 This recitation worksheet covers Ch 4 2 4 5 4 7 Please enter your first and last name as it appears on the eLC roster do not use a nickname that is not reflected in eLC Your UGA myID is a combination of letters and numbers example Dr Seivert s MyID is mds73312 Do not use your 81x number Your completed worksheet has to be submitted to Gradescope You have multiple options for submission o You may use an app to annotate the worksheet by placing your answers in the answer boxes and showing your work when appropriate Afterward submit the worksheet to Gradescope You will not need to upload anything to eLC o You may print out the worksheet write your answers in the answer boxes and show your work on it when appropriate Afterward convert the worksheet to a PDF and submit to Gradescope You will not need to upload anything to eLC If you do not have access to a printer you may type your answers directly into the worksheet PDF and then submit it to Gradescope Write your work on separate sheets of paper convert them to a PDF and upload to the appropriate dropbox on eLC o There is a Gradescope app available for both iOS and Android devices that allows you to scan and submit your printed work or you can submit your fillable PDF directly o The following criteria must be met to be eligible for full credit o You must make sure the pages are in the correct order and have the same layout as the original worksheet when submitting to Gradescope regardless of your submission type o Answers must be written in the corresponding answer boxes o You must show your work when appropriate This worksheet is due no later than 9 00 AM on the Saturday of the recitation A periodic table and formula sheet are attached to the end of this worksheet Please keep these attached to your worksheet in the correct order when submitting to Gradescope week 1 Carbon monoxide reacts with oxygen to produce carbon dioxide according to the chemical equation 2 CO g O2 g 2 CO2 g Given the initial reaction mixture shown in the figure grey spheres represent oxygen and whites sphere represent carbon which figure best represents the mixture after the reaction has ended B D 0 B A C E 2 First balance the equation below then answer the following questions in which 20 00 grams of explosive sodium metal and 20 00 grams of poisonous chlorine gas produces sodium chloride Report your answers in standard notation 2 Na s Cl2 g NaCl s 2 a What is the limiting reactant B A Na B Cl2 C Both Na and Cl2 b What mass in grams of NaCl forms if the percent yield is 100 0 31 84 c What mass in grams of NaCl forms if the percent yield is 74 1 23 6 d What is the percent yield of the reaction if 23 51 grams of NaCl is collected 73 84 g g 3 Consider the balanced combustion reaction below in which 6 67 mL C3H7OH d 0 804 g cm3 reacts in the presence of 9 04 g O2 gas yielding 2 45 mL of H2O density 1 00 g cm3 Report your answers in standard notation 2 C3H7OH l 9 O2 g 6 CO2 8 H2O a What is the limiting reactant B A C3H7OH B O2 b What is the theoretical yield of H2O in grams c What is the percent yield of H2O 4 525 54 14 g g 4 A scientist goes to lab to synthesize Na3AlF6 via the balanced chemical reaction below If they need 780 grams of Na3AlF6 and the overall percent yield is 45 4 how much Al2O3 in grams is needed You may assume NaOH and HF is in excess here Report your answer in standard notation 6 NaOH Al2O3 12 HF 2 Na3AlF6 9 H2O 5 Consider the balanced equation below in which 10 86 grams of PCl5 reacts with 13 58 grams of AsF3 3 PCl5 5 AsF3 3 PF5 5 AsCl3 a What is the excess reactant B A PCl5 B AsF3 b How many grams of excess reactant are left over after the reaction is complete Report your answer in standard notation and with four significant figures 6 700 g 6 In combustion analysis the oxygen content of a substance is equal to the total oxygen in the CO2 and H2O collected in the absorbers B A True B False 7 Write the chemical equation for the combustion of butanoic acid C4H8O2 and determine which statements are true Select any that apply and answer using capital letters with no spaces e g ABCDE AE A Combusting 1 mole of butanoic acid produces 4 moles of water B Carbon monoxide and water are the two products of this reaction C The sum of the stoichiometric coefficients on the balanced chemical equation is 13 D The total number of moles on the product s side is equal to the total number of moles on the reactant s side E To react 5 moles of oxygen 1 mol of butanoic acid is required 8 Consider an unknown organic compound composed of carbon oxygen and hydrogen A 10 00 g sample of this compound is burned completely in the presence of excess oxygen in which 16 94 g of carbon dioxide and 6 930 g of water are isolated Provide an empirical formula for this compound Answer by listing the chemical formula with the carbon first then hydrogen then oxygen e g CxHyOz Cult 03 Cult 03 The molar mass of this compound is 104 12 g mol Provide the molecular formula listing the formula with the carbon first then hydrogen then oxygen e g CxHyOz 9 What mass g of NaOH is contained in 250 0 mL of a 0 400 M sodium hydroxide solution Report your answer in standard notation 10 Concentrated hydrochloric acid is approximately 12 2 M If a student needs to prepare 300 mL of 1 500 M hydrochloric acid what volume mL of concentrated acid is needed Report your answer in standard notation 11 What is the molarity of the chloride ions in a 600 mL solution after 127 4 g of aluminum chloride molar mass 133 33 g mol has been added Report your answer in standard notation 4 00 g 36 9 mL 4 778 M 12 Consider a hypothetical set of experiments completed by a student in lab given below Answer the following questions using standard notation a The student starts by dissolving 7 24 103 milligrams of NaCl in 150 00 mL deionized water inside a volumetric flask What is the concentration of NaCl in the flask NaCl 826 M b In a separate flask the student dissolves 3 79 10 2 kilograms of LiBr in 200 00 mL deionized water What is the concentration of LiBr in the flask …