Question

A base dissociation (hydrolysis) takes the following reaction pattern:

Base    +   H₂O    = OH^-     +    Conjugate acid     

For example the dissociation reaction of CH3COO- is presented as

CH₃COO^- +    H₂O   =     OH^-    +      CH₃COOH           

If you write down the dissociation (hydrolysis) reaction of CN^-, it is presented as [Q1].

Do not try to make subscriptization or superscriptization. Just type numbers, and + and - signs in the same way as you type words. Examples: H3O+, Cl-, HPO42-, etc.

In order to give a space, hit the space bar once after typing each compound formula or ion formula or + sign or equal sign.

Write down the expression of the equilibrium constant of the combined reaction of the following two dissociation reactions:

HCN + H₂O = H₃O⁺ + CN^-   K_a

CN^- + H₂O =   HCN + OH^- K_b

Do not try to make subscriptization or superscriptization. Just type numbers, and + and - signs in the same way as you type words. Examples: H3O+, Cl-, HPO42-, etc.

The equilibrium constant for the following reaction at 500 K is assumed to be 100.

             3H₂      +     N₂      =     2NH₃

Concentrations of H₂, N₂, and NH₃ are observed to be 1.0 M, 2.0 M, and 10.0 M, respectively, at the same temperature of 500 K.

An equilibrium has______________reached. The reaction should proceed to the __________________.

Type the word left or right for the second question.  

Answer 1

3H₂      +     N₂     --------->    2NH₃

         Qc   = [NH3]^2/[N2][H2]^3

                 = (10)^2/2*(1)^3

                 = 100/2   = 50

Kc           = 100

Kc> Qc

The equilibrium shift to right side.