Constants | Periodic Table Chemical equilibrium is the reaction state when the c
ID: 1036138 • Letter: C
Question
Constants | Periodic Table
Chemical equilibrium is the reaction state when the concentrations of reactants and products remain constant over time. The reaction does not stop, but it reaches a dynamic equilibrium when the rates of the forward and reverse reactions become equal. A mixture of reactants and products in the equilibrium state is called an equilibrium mixture. Let's consider a general reversible reaction where A and B are the reactants and C and D are the products:
aA+bB?cC+dD
The concentrations in an equilibrium mixture are related by the equilibrium equation
Kc=[C]c[D]d[A]a[B]b
where Kc is the equilibrium constant.
Part A
The following pictures represent the equilibrium mixtures of five different chemical reactions. All the reactions proceed according to the general balanced chemical reaction
A+B?AB
Red spheres represent A atoms, blue spheres are B atoms, and red-blue clusters are AB molecules. Rank the reactions in order of increasing equilibrium constant.
Rank the reactions from smallest to largest equilibrium constant To rank items as equivalent, overlap them.
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Largest equilibrium constant
Smallest equilibrium constant
The correct ranking cannot be determined.
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Part B
A chemical reaction between X2 (red) and Y2 (blue) produces XY (red-blue). All compounds are in a gaseous state. The picture shown here represents the equilibrium mixture.
Calculate the equilibrium constant for the balanced reaction between one mole of each reagent.
Express your answer numerically to three significant figures.
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Largest equilibrium constant
Smallest equilibrium constant
The correct ranking cannot be determined.
Explanation / Answer
High equilibrium constant means more no. Of reactants are colliding effectively to form products .on comparing all the 5 representation,we can see that in the last figure all the reactant molecules have combined to form the produc whereas in case 3 the reactant molecules have not combined to form products( the reaction mixture contains more of the reactant i.e low kf value)
3<2<4<1<5
b) 6A2 + 3B2-> 7AB here B2 will act as limiting resgant and will decide the amount of AB formed.
A = .5 mole, B= 1/3 mole and AB= 7/3 mole
K= [AB] ^7/ [A]^6×[B]^3