Question

ies and Due Dates > Sapling HW-6 Resources 10 Hin Question 3 of 19 > When determining the equilibrium concentrations for the reaction AB(8) A(g) +B(6) [AB] K = - AB a simplifying assumption can be used under certain conditions to avoid solving a quadratic equation. K= 3 - 2 AB Classify each situation by whether the simplifying assumption can be used or whether the quadratic formula is required. Simplifying assumption can be used Quadratic formula required Answer Bank AB) -0.424 MK-2.62 x 10" AB -0.0395 MK-1.56 x 10 JAB 0.127 MLK - 2.89 x 10-4 AB=0.0195 MK-9.31 x 10 AB -0.00139 MK - 1.01 x 10-5 po m e hele 45

Answer 1

Solution? we have a given equation. A Big Acg + Big) Kc = [A][B] [AB] Now for [AB] = 0.424 m KC = 2.62 x 103 Let us assume simplifying assumption can be used kc = x² Car] 2.62160-3 = ? 0424 2. 2=0.03 from this we can find dissociation constant (on) which comes out to be greater than 0.05.so we have to use quadratic formula Now for [AB] = 0.0395m k= 1.568105 Here we got a = 7.84x109 m. and dessociation constant is 0.019 and it is less than 0.05, so here we use Simplify aMumphicм. similarily we can do for cose 3, 4 and 5. And got & z, &y and as as 0.0433, 0.068 and So from this we conclude that we have use quadraticformula in ath cose, and simplifying assumption in case 3rd and 5th respectively 00269

SIMPLIFYING ASSUMPTION QUADRATIC FORMULA [AB] = 0.0395, Ke=1.96x105 [AB]= 0.127 Ke = 2.39 x 104 [AB] -0.00139 Re = 1601x 186 [AB] = 0.424, Ke= 2.62x163 [AB] = 0.0195, k = 9.311105

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