In many papers, when i read the synthesis part of it , they mention that sample was treated with concentrated acid for some hours. Please explain someone, what they actually did? Thanks in advance.
If i want to analyse the % of metal in complex firstly add conc. HNO3 acid to decompose the complex
but if the addition during the synthesis schiff base for example (the addition of glacial acetic acid ) it help to catch the H2O to faster the schiff base synthesis.