Question

It was found equilibrium vapour are 62 times as heavy as hydrogen the degree of dissociation of pcl5

Answer 1

Answer:

68.14

Explanation:

It was found equilibrium vapour are 62 times as heavy as hydrogen the degree of dissociation of pcl5

We know that  

Mf = calculated molecular mass

Mo = observed molecular mass

Now α = Mf – Mo / Mo

So theoretical mass of Pcl5 (phosphorous penta chloride = 208.2)

Observed molecular mass = 62 x mol wt of hydrogen

                                          = 62 x 2

                                           = 124

Now α = 208.2 – 124 / 124

           = 0.6814

           = 68.14 %