Problem 2
Explain how molecular size and oxygen concentration differences could explain the relative solubilities of humic acid and fulvic acid.
Problem 6
The equivalent weight of HM is sometimes defined as the molar mass per mol of carboxylic plus phenolic groups. For a particular sample of fulvic acid whose molar mass is 6036 daltons, there are \(4.2\) and \(2.2 \mathrm{mmol}\) of carboxylic and phenolic groups respectively per gram of the FA. What is the equivalent weight?
