(c) (5 marks) HEPES is comn mercially available as a sodium salt. After solubilizing some sodium HEPES in water, should you add acid or base to prepare a buffer at 7.40?

(a) (5 marks). From elemental analysis, it is found that MSG contains the following mass distribution: carbon (35.00%), hydrogen (4.69%), nitrogen (8.16%), oxygen (38.57%), sodium (13.52%). Find the empirical formula of MSG [Molar mass information (g/mol): carbon 12.01, hydrogen 1.01, nitrogen 14.01, oxygen 16.00, sodium 23.00]