Question

(III) When 50.0 mL of a 0.3000 M AgNO, solution is added to 50.0 mL of a 0.2000 M solution of MgCl, an AgCl precipitate forms immediately. The precipitate is then filtered from the solution, dried, and weighed. If the recovered AgCl is found to have a mass of 1.7825 g, what is the percentage yield of the product, 1) Write the balanced equation for the reaction. 2) Calculate number of moles of each reactant and determine which one is a Limiting reagent. 3) Calculate the theoretical yield of the product, AgCl. 4) Calculate the percentage yield of the product.

Answer 1

ITI Ans - The given sea The given reaction can la willin as AgNogo(aq) + Mg, (aq) Agu (s) + Mg(Nos) (aq) Aus! - The balanced chemical equation for the reaction BAG NOglag) + mg (g(ag) -24901) + Mg(wow), (09) 24. aus Given that some of 0.2000 m nguy Dans - Gwew that somL of 0.3000 m Aq NO₂ solution is added to so.omL of 0.2000 m Malla solution Number of moles of AgNO₃ = (50*0.3000) millimoles of Aglo [.: M = 7 ) n = mxu ] = 15 millimous of AgNaz = 0.015 moles of AgNO3 [ Imole = 1000 millindus] Similarly, Number of moles of Mal2 = ( 50x0,2m) millinoles of Mall, = 10 millimols of mach, = 0.01 miles of mach from the balanud equation, 2 miles of Ag Noz reacts with Indle of my ly and gives 2 roles of Agll.

2 moles of Ag Noz reacts with Imole of malla : 0.015 moles of AgNO will react with Ix0.015 moles of Mall, = 0.0075 miles of Mall Only 0.0075 moles of mall, is used to react with 0.015 moles of AgNo, thus AgNO₃ is the limiting reagent as the remaining moles of mala are present as excun. Number of moles of AgNO₃ = 0.015 miles . Number of miles of malz= 0.010 moles. dus - From the balanced equation 2 moles of AgNo gives a miles of Agle. Since AgNO3 is the limiting reagent, the product will depend on AQNOB. :.0.015 miles will give 8. 2 x 0.015 moles of Aque = 0.015 moles of Age. The theoretical yield of the product Aqce is 0.015 moles 0.015 moles of Age contains 0.015* (107.8 +35.5) of Agile = 2.1495 g of Age. 6 Ans - - Percentage yuld is given by Percentage yeeld = experimental yeild im Percentage you Theoretical yuld - 107825 x 10% ['1107825g is 2.1495 erperan = 82.92 The percentage jild of the product Agd is 82.92%.