How to Correct: 'To avoid this unpleasant circumstance, the chair of the department and the president of the university are expected to change their old mindset to realize others' right of their own confidentiality.'

The sentence 'To avoid this unpleasant circumstance, the chair of the department and the president of the university are expected to change their old mindset to realize others' right of their own confidentiality.' contains a few grammatical errors. Here's how to fix them:

1. 'Realize' should be 'recognize': The sentence is about acknowledging or understanding a right, not making it happen. 'Recognize' is the correct word here.
2. 'Of' is redundant: 'Right to confidentiality' is the correct phrasing. The word 'of' is unnecessary.
3. 'Their own' is unnecessary: 'Others' right to confidentiality' is sufficient and clearer.

Here is the corrected sentence:

To avoid this unpleasant circumstance, the chair of the department and the president of the university are expected to change their old mindset and recognize others' right to confidentiality.