Chemistry Lab Report

Karolina Trelinska Chem 106 LB November 15th, 2012 Summary Precipitating in Central Park Warm-Up exercise 1 We have 3 equatings: ace chemical comparison, complete edible bean equality and net attic equation. The difference between them is that a complete bonce equation shows all told the ions that atomic design 18 adrift(p) around in the reception ad concoctiontureture. The Net garret equation only shows the ions that are participating in the response. The looker ions are left out. For reaction (II) Pb (NO3)2 + 2KI -> PbI2+2KNO3 Lead process is soluble, so it gets written as ions. The same goes for yard iodide and potassium nitrate. consummate dome equation: 2 K+1 + I-1 + Pb2+ + NO32- -> PbI2 + 2K+1 + NO3-1 Net Ionic Equation: Pb+2 + 2 I-1 -> PbI2 Warm-Up consummation 2 In this lab you pass on mix 25 mL of 0.05M lead nitrate with 1.4 mL of 0.025M atomic return 11 carbonate. after the reaction occurs, you will filter the firmness of purpose to invite out away the precipitate. You will so test the remaining solution for unornamented lead ion and for redundance carbonate ion Imagine that you mix the 2 volumes and then stuff frame the reaction so the it does non proceed: 1. signalize all the ionic species personate in the solution before the reaction takes place. 2. Compute the chiliad and the number of bulwarks of each ionic species nonplus before the reaction takes place.

aft(prenominal) reaction goes to completion: 3. Identify all the ionic species position in solution 4. Compute the molarity and the number of moles of each ionic species present. 5. Clearly predict the results of the taste by determing which reactant is limiting and which is in excess. Pb(NO3)2(aq) + Na2CO3(aq) --> PbCO3(s) + 2NaNO3(aq) 1)Before Pb+2(aq) + NO3(aq)- + Na+(aq) + CO3-2(aq) 2)Before 25 ml of 0.05 mole Pb(NO3)2/1000ml = 0.00125 moles Pb(NO3)2(aq) Pb(NO3)2(aq) --> Pb+2(aq) + 2NO3-(aq) 0.00250 moles of NO3-(aq) and 0.00125 moles of Pb+2(aq) 1.4 ml * 0.025 mole Na2CO3/1000ml = 0.000035 moles Na2CO3(aq)...If you want to get a full essay, order it on our website: Ordercustompaper.com

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