Answered: When some moles of NH4Cl(s) are removed…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Consider the following system at equilibrium where H° = 268 kJ, and K_c = 5.10×10^-6, at 548 K.

NH₄Cl(s) NH₃(g) + HCl(g)

When some moles of NH₄Cl(s) are removed from the equilibrium system at constant temperature:

The value of K_c _________ (increases.decreases.remains the same.)

The value of Q_c _________ (is greater than-is equal to-is less than K_c.)

The reaction must

a. run in the forward direction to restablish equilibrium.
b. run in the reverse direction to restablish equilibrium.
c. remain the same. It is already at equilibrium.

The concentration of NH₃ will _________ (increase.decrease.remain the same.)

Expert Solution

Step 1

Equilibrium constant is the ratio of product of the concentration of products to the product of the concentration of the reactants raised to the power of their respective coefficients. For example,

$a A + b B \Leftrightarrow c C + d D$

Thus, $K_{c} = \frac{{[C]}^{c} \cdot {[D]}^{d}}{{[A]}^{a} \cdot {[B]}^{b}}$

According to Le-chatelier's principle, when there is any disturbance or change in the system at equilibrium then the system attains a new equilibrium state to alter the change.

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