Consider the given reaction. A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40 Suppose 18.4 mol A reacts with excess B in 9.20 L of solution. Calculate the concentration of C at equilibrium. [C]= M

Question

Consider the given reaction. A(aq)+B(s)↽−−⇀C(aq)𝐾=9.40 Suppose 18.4 mol A reacts with excess B in 9.20 L of solution. Calculate the concentration of C at equilibrium. [C]= M

Answer 1

A(aq) + B(s) <==> C(aq) ... K = 9.40

[A] = 18.4 mol / 9.20 L = 2.00 M

Write the equilibrium expression:

K = [C] / [A]

Set up an ICE table:

A(aq) + B(s) <==> C(aq)

2.00 M...................0............Initial

-x..........................+x..........Change

2.00-x....................x...........Equilibrium

Fill in the equilibrium expression and solve for x:

9.40 = x / 2-x

x = 18.8 - 9.40x

10.40x = 18.8

x = 1.81 M = [C] at equilibrium