Question

gnment Score: 88.3% 00 12 - Hint Check Answer cion 19 of 20 Attempt 3 Phosphorous pentachloride decomposes according to the reaction PCI (8) - PC1,(8) + C1,() A 15.1 g sample of PCI, is added to a scaled 1.25 L flask and the reaction is allowed to come to equilibrium at a constant temperature. At equilibrium, 45.8% of the PCI, remains. What is the equilibrium constant, K, for the reaction? A Not a valid number 0.3721 wrong Kc = Explain your reasoning: This ungraded area will provide insight to your instructor

Answer 1

Equilibrium constant is the ratio of concentration of products and concentration of reactants at equilibrium state.

XIOD - Plus - PUz + Cl2 MB of P15 = 208. 24 g/mol 4:0 0-0725 0 0 - W= 15o1gm tt 0.0725-4 n a na Si = 0.0725 208.24 moles ::*=0.0332 more %d=45.8% At equilibrium 7.2= Melissociate xloo nous 0.0725- 0.0332 - ninitial = 0.0393 moles [Pus] = 0.0393 = 0.0314 M "dissociate= 72 X initial "PCAZ E N= 0.0332 miles = 45.8 X0.0725 [pus] = * = 0;0332= 0.02667 hele = 0.0332 moles (44) = * = 0,032 = 0.02607 v= 1.251 1. 25 100 7.25 100 =00332 moles 0.0266 X 0.0266 Kc = 0.0314 Tras ke=0.0225 )