vant's hoff's factor
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/what-is-van-hoffs-factor-for-a-compound-which-undergoes-tetr/chemistry/2922618
https://www.meritnation.com/ask-answer/question/what-is-van-hoffs-factor-for-a-compound-which-undergoes-tetr/chemistry/2922618