I want to prepare a solution of humic acid with concentration 4mM and 100mM but i can't find it's molecular weight
Dear Mohamed El Said, according to wikipedia, the chemical structure is C9H9NO6 and MW = 227.17 g/mol. My Regards
Dear M El Said! Please check the following reference for Humic acid. Here the chemical formula for Humic acid is entirely different from what is suggested by Bouaziz in his answer.
Britannica, The Editors of Encyclopaedia. "Humic acid". Encyclopedia Britannica, 10 Sep. 2020, https://www.britannica.com/science/humic-acid
From the chemical formula of Humic acid you can easily calculate its molecular weight by adding the atomic weights of constituent atoms.
Dear all, the following link supports my previous answer. My Regards
https://pubchem.ncbi.nlm.nih.gov/compound/Humic-acid#section=2D-Structure
Humic acid is also the generic name of a wide range of base-soluble, organic molecules originating from the decay of vegetation. As such there is no atomic mass hence molar concentrations cannot be determined. Concentrations re reported in mass per volume units.
https://www.sciencedirect.com/topics/earth-and-planetary-sciences/humic-acid
It depends where you get the humic acid from (which reagent bottle) because humic acid is generally a mixture of different acids. Abdelkalder is correct, there is a humic acid with a molecular weight of 227.17g/mol but if you don't find it on the container you're using, you most likely have a mixture so you won't know the molar concentration, so you could work with % weight to standardize concentrations instead.
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanoparticle Research