# Calculation of the degree of Association

dev
Abnormal molecular mass and Van’t Hoff factor, Calculation of the degree of Association, Colligative Properties, solutions

### Calculation of the degree of Association

In some cases, ‘n’ molecules of the solute ‘A’ associate to form large associated molecule ‘A_{n}’. The fraction of the total number of solute molecules which exist in the form of associated molecule is called **degree of association (α)**.

\( \alpha =\frac{Number~of~moles~associated}{Total~number~of~moles~taken} \)

Observed colligative property** = \( (1-\alpha )+\frac{\alpha }{n} \)**

Calculated colligative property **= 1**

\( i=\frac{C_{o}}{C_{c}}=\frac{(1-\alpha )+\frac{\alpha }{n}}{1} \)

\( \alpha =(1-i) \frac{n}{n-1} \)

As we know that, \( i=\frac{M_{c}}{M_{o}} \)

\( \therefore ~~~\alpha = \left ( 1-\frac{M_{c}}{M_{o}} \right )\frac{n}{n-1}= \left ( \frac{M_{o}-M_{c}}{M_{o}} \right )\frac{n}{n-1} \)

### You should check out our other content to boost your self-study.

- You can read and download our notes

- You can practice multiple choice questions.

- You can practice short and long answer questions

- You can watch our pre-recorded video lectures.

- You can participate in multiple choice questions quiz.