The italian schools require starting from the last years of the colleges or high schools (both technical that professional institutes) that one of the main matter can be delivered in the english language trough a clear methodology that is called CLIL. This skills is also required for the last three years of the linguistic Lyceum. In the first part of the text, there are also described the old and the new key competences that alumni need to have in the prevision of a new Europe, dated 28th of May 2018. Considering actually that the learning objects, now more than before, need to be delivered in a foreign language, we report analitically the description of a whole unit in english for educational purpose to be used by chemistry teachers on the basys of the CLIL rules.