Question

pcl5 gives us pcl3+cl2.. in the above equation condition mole fraction of pcl is 0.4 and mole fraction of cl2 is 0.3. then find out mole fraction of pcl3

Answer 1

Answer:- 0.3

Solution:- The balanced equation is:

$PCl_5\rightarrow PCl_3+Cl_2$

From this equation, there is 1:1 mol ratio between the products. It means the moles of $Cl_2$ and $PCl_3$ formed will be equal and if the moles are equal then their mole fraction has to be equal.

The mole fraction of chlorine is given as 0.3, so the mole fraction of $PCl_3$ must also be 0.3.

If we think about another way then, sum of mole fraction is always 1.

So, mole fraction of $PCl_5$ + mole fraction of $Cl_2$ + mole fraction of $PCl_3$ = 1

Let's plug in the values in it...

0.4 + 0.3 + mole fraction of $PCl_3$ = 1

mole fraction of $PCl_3$ = 1 - 0.4 - 0.3  = 0.3

Hence, the mole fraction of $PCl_3$ is 0.3.

Answer 2

Answer:

0.3 is the right ans.

Explanation:

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