Hi! I was pH-ing some HEPES to 8.2 and went too far with the NaOH (now solution has a pH of 8.34). Can I add a bit of HCl to lower it back to 8.2? If not, is there any time that doing that would be okay? Would there be any time that the opposite would be okay (adding some NaOH when going too far with the HCl)? Thanks!