Question

Question #b54e2

Answer 1

`K_c=([HI]^(2))/([H_2][I_2])`

Where [ ] represents concentrations at equilibrium.

Explanation:

In general for a reaction:

`aA+bBrightleftharpoonscC+dD`

• the expression for `K_c` is given by:

`K_c=([C]^(c)[D]^(d))/([A]^(a)[B]^(b))`

Where [ ] represents concentration of the species at equilibrium.

If we apply the general rule to this specific reaction:

`H_(2(g))+I_(2(g))rightleftharpoons2HI_((g))`

we get:

`K_c=([HI]^(2))/([H_2][I_2])`

Note that whenever you quote a value for `K_c` you must also state the temperature as well.