For prepare a mixture of two solvents, where one of them is chloroform and the other must have a pH between 4 and 10. Any suggestion, please?

I need to prepare a mixture of two solvents where one of them is chloroform and the other must have the characteristics of having a pH between 4 and 10. Does anyone have any suggestions, please?

18 February 2019 7,118 2 View