7 Solved Questions for Midterm Exam - Introduction Chemistry 1 |, Exams of Chemistry

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14, Write balanced “molecular”, complete ionic, and net ionic chemical equations for the following reactions: a. The precipitation of lea # my when a KI solution is “es to a solution of Pb(NOs)o- Akt y Pl (0s) sy S PLT. GY 4AKWOs 2 és) kite al” sPhts 9M; > Phlay 42K Ady at Ph —> Pla ) b, The neutralization of HCI by calcium carbonate to give calcium chloride; water, and carbon. dioxide (TUMS reaction). aie, 4 GOx, 2 4G, * Oa, “ Neg, a ~ 4 2H" 3a + Calg» 4 3G “1 Loy O@) okt + C2ld? 36) > a? ty Dail + Nalgy c. The oxidation of sodium metal hy water to give sodium iiftroxide and hydroget gas. Nagy *ANeG, Abeba ® Mg Q M4 os + Nig — rat oO a7 Mg 15. What is the sons of No gas near the surface of Titan where the temperature is -180°C and the pressure is 1.5 atm? What is the density of Nz gas on earth say on a cold day at 01°C and 1 atm’? "> PyseRtT #2 P Vy “2 a/ ny WAP geo Mae 1s cA oY , “oT 7 goers BS SL Soe Vv RT 2082us Eas 73k b M Bin is hs nd — j Seah SA bed. meebo, 26 ~fpaca The acetylene forch is used ieeane steel betthse acetylene (also known as ethyhe or C,H.) bums very hot. Use the attached table of average hand energies to estimate the molar heat of reaction for the complete combustion of acciylenc, C,Hp, in excess oxygen. (Ilint: First write a balanced reaction equation and then draw all Lewis structures for reactants and products.)