Question

In: Chemistry

For the reaction shown below, the initial concentrations for reactants and products are as follows: [A]...

For the reaction shown below, the initial concentrations for reactants and products are as follows: [A] = 0.27 M, [B] = 0.0640 M, [C] = 0.0134 M, and [D] = 1.47 M. If the equilibrium constant for the reaction is KC = 0.802, which direction does the reaction have to shift to reach equilibrium?

A + 3B ⇌ 2C + 3D

Enter 1 if it shifts left, 2 if it shifts right, or 3 if it's already at equilibrium.

Solutions

Expert Solution

Answer:-

Given:-

molar concentration of A i.e [A] = 0.27 M

molar concentration of B i.e [B] = 0.0640 M

molar concentration of C i.e [C] = 0.0134 M

molar concentration of D i.e [D] = 1.47 M

equilibrium constant (Kc) = 0.802

As we know that

A + 3B 2C + 3D

therefore

equilibrium constant (Kc) = [C]2[D]3 / [A][B]3  

equilibrium constant (Kc) = (0.0134)2 (1.47)3 / (0.27)(0.0640)3  

equilibrium constant (Kc) = 0.00017956‬ 3.176523‬ / 0.27 0.000262144‬

equilibrium constant (Kc) = 0.00057037646988‬‬ / 0.00007077888‬

equilibrium constant (Kc) = 8.05

As mentioned in above value of equilibrium constant (Kc) i.e calculated value of equilibrium constant (Kc) is equivalent to the given value of equilibrium constant (Kc).

So

calculated value of equilibrium constant (Kc)   given value of equilibrium constant (Kc)

8.05     0.802

Therefore we can say that the reaction is already at equilibrium. Since we know that the value of equilibrium constant (Kc) indicates that following conclusions.

(I) - Greater value of equilibrium constant (Kc) indicates that the reaction is proceeded to a greater extent in the forward direction i.e formation of product (C and D).

(II) - Lower value of equilibrium constant (Kc) indicates that the reaction is proceeded to a greater extent in the backward direction i.e formation of reactants (A and B).

(III) - If the value of equilibrium constant (Kc) of the reaction is equal to 1 or given value of equilibrium constant (Kc) then it means that reaction is at equilibrium. At equilibrium, rate of forward reaction i.e formation of products (C and D) is equal to the rate of backward reaction i.e formation of reactants (A and B). In other words at equilibrium there is no formation of products or reactants.

therefore

correct answer is as follows:-

The reaction is already at equilibrium i.e 3. ( answer)

queen_honey_blossom answered 1 year ago
Next > < Previous

Related Solutions

Calculating Equilibrium Concentrations The concentrations of reactants and products for a chemical reaction can be calculated...
Calculating Equilibrium Concentrations The concentrations of reactants and products for a chemical reaction can be calculated if the equilibrium constant for the reaction and the starting concentrations of reactants and/or products are known. Part A Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 2COF2(g)⇌CO2(g)+CF4(g),    Kc=7.20 If only COF2 is present initially at a concentration of 2.00 M, what concentration of...
The initial concentrations or pressures of reactants and products are given for each of the following...
The initial concentrations or pressures of reactants and products are given for each of the following systems. Calculate the reaction quotient and determine the direction in which each system will proceed to reach equilibrium. (a) 2NH3 (g) ⇌ N2 (g) + 3H2 (g) Kc = 17; [NH3] = 0.50 M, [N2] = 0.15 M, [H2] = 0.12 M (b) 2NH3 (g) ⇌ N2 (g) + 3H2 (g) KP = 6.8 × 104 ; initial pressures: NH3 = 2.00 atm, N2...
The concentrations of reactants and products for a chemical reaction can be calculated if the equilibrium...
The concentrations of reactants and products for a chemical reaction can be calculated if the equilibrium constant for the reaction and the starting concentrations of reactants and/or products are known. Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 2COF2(g)⇌CO2(g)+CF4(g),    Kc=7.40 If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? Consider...
The concentrations of reactants and products for a chemical reaction can be calculated if the equilibrium...
The concentrations of reactants and products for a chemical reaction can be calculated if the equilibrium constant for the reaction and the starting concentrations of reactants and/or products are known. Consider the reaction CO(g)+NH3(g)⇌HCONH2(g),    Kc=0.890 If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 M and 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium? Please show all steps! Thank you!
Consider the reaction shown below. Is the equilibrium likely to favor the reactants or products? Hint:...
Consider the reaction shown below. Is the equilibrium likely to favor the reactants or products? Hint: you can view this reaction from a HSAB perspective. H2S + OH- --><-- SH- + H2O (please explain) A. The equilibrium likely favors the reactants. B. It is not possible to make a reasonable prediction without knowing the pKas of H2S and H2O. C. The equilibrium likely favors the products.
A reaction was run with two different initial concentrations of reactants A and B: Experiment A...
A reaction was run with two different initial concentrations of reactants A and B: Experiment A / M B / M rateB / (M/sec) 1 0.00022 0.00046 0.0841 2 0.00022 0.00166 0.3035 What is the order of the reaction with respect to B? A reaction was run with two different initial concentrations of reactants A and B: Experiment A / M B / M rateB / (M/sec) 1 0.00057 0.00067 0.0000825 2 0.00057 0.00621 0.0657 What is the order of...
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants....
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected: Trial [A] (M) [B] (M) [C] (M) Initial rate (M/s) 1 0.50 0.50 0.50 1.5×10−4 2 0.50 0.50 1.50 4.5×10−4 3 1.00 0.50 0.50 6.0×10−4 4 1.00 1.00 0.50 6.0×10−4 Rate law equation The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction between Aand B, aA+bB⇌cC+dD The dependence of the reaction...
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants....
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected: Trial [A] (M) [B] (M) [C] (M) Initial rate (M/s) 1 0.30 0.30 0.30 9.0×10−5 2 0.30 0.30 0.90 2.7×10−4 3 0.60 0.30 0.30 3.6×10−4 4 0.60 0.60 0.30 3.6×10−4 What is the reaction order with respect to A? What is the reaction order with respect to B? What is the reaction order with respect to C? Express your...
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants....
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected: What is the value of the rate constant k for this reaction? Trial [A] (M) [B] (M) [C] (M) Initial rate (M/s) 1 0.10 0.10 0.10 3.0×10−5 2 0.10 0.10 0.30 9.0×10−5 3 0.20 0.10 0.10 1.2×10−4 4 0.20 0.20 0.10 1.2×10−4
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants....
For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected: Trial [A] (M) [B] (M) [C] (M) Initial rate (M/s) 1 0.20 0.20 0.20 6.0×10−5 2 0.20 0.20 0.60 1.8×10−4 3 0.40 0.20 0.20 2.4×10−4 4 0.40 0.40 0.20 2.4×10−4 Rate law equation The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction between Aand B, aA+bB⇌cC+dD The dependence of the reaction...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT