Chat with tutor

Ask Questions, Get Answers

Questions  >>  JEEMAIN and NEET  >>  Chemistry  >>  Solutions

Which of the following has maximum freezing point for 1 molal solution, assuming equal ionisation in each case?

$\begin{array}{1 1}(a)\;[Fe(H_2O)_3Cl_3].3H_2O\\(b)\;[Fe(H_2O)_4Cl_2].Cl.2H_2O\\(c)\;[Fe(H_2O)_5Cl].Cl_2.H_2O\\(d)\;[Fe(H_2O)_6].Cl_3\end{array}$

1 Answer

Since, Maximum freezing point $\propto \large\frac{1}{\text{No of dissociated particles}}$
Since, the compounds $[Fe(H_2O)_4Cl_2].Cl.2H_2O, [Fe(H_2O)_5Cl].Cl_2.H_2O$ and $[Fe(H_2O)_6].Cl_3$ has $Cl^-$ as a ligand not attached to the central atom, they dissociate into its constituents.
$[Fe(H_2O)_3Cl_3].3H_2O$ is a single species, because there is no such metal or non-metal not attached to the central atom. So, i = 0
Thus, $[Fe(H_2O)_3Cl_3].3H_2O$ has the maximum freezing point.
Hence (a) is the correct answer.
Help Clay6 to be free
Clay6 needs your help to survive. We have roughly 7 lakh students visiting us monthly. We want to keep our services free and improve with prompt help and advanced solutions by adding more teachers and infrastructure.

A small donation from you will help us reach that goal faster. Talk to your parents, teachers and school and spread the word about clay6. You can pay online or send a cheque.

Thanks for your support.
Please choose your payment mode to continue
Home Ask Homework Questions
Your payment for is successful.
Clay6 tutors use Telegram* chat app to help students with their questions and doubts.
Do you have the Telegram chat app installed?
Already installed Install now
*Telegram is a chat app like WhatsApp / Facebook Messenger / Skype.