To uninstall education-chemistry just follow these instructions.
sudo apt-get remove education-chemistry
This will remove just the education-chemistry package itself.
sudo apt-get remove --auto-remove education-chemistry
This will remove the education-chemistry package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for education-chemistry then this will work.
sudo apt-get purge education-chemistry
Or similarly, like this education-chemistry
sudo apt-get purge --auto-remove education-chemistry
|Maintainer||Debian Edu Developers <email@example.com>|
|Description||Debian Edu chemistry related applications|