Asked in ChemistryElements and Compounds
Elements and Compounds
What is the cinjuate base of HPO4-2?
Asked in Elements and Compounds
Hows does a dipotassium hydrogen phosphate work as a buffer?
K2HPO4 is an amphoteric substance. It can act as an acid and also as a base. When an acid is added to K2HPO4, it acts as a base. H+ + HPO42- --> H2PO4- or HCl + K2HPO4 --> KCl + KH2PO4 When a base is added to K2HPO4, it acts as an acid. OH- + HPO42- --> PO43- + H2O or KOH + K2HPO4 --> K3PO4 + H2O Hope this helps! Pushpa Padmanbhan
Asked in Acids and Bases
How do you write the equation for the acid hydrolysis of phosphoric acid?
Asked in Biochemistry, Chemistry, Acids and Bases
Is h2po4 a diprotic acid?
Asked in Chemistry, Acids and Bases
At pH 7.5 which species predominate of H3PO4?
HPO42- is the most abundant phosphate present at pH=7.5, but H2PO42- is also there in (less) significant amounts. PO43- and H3PO4 are practically absent at pH 7.5. This is because it is between the values pH=pKa,3= 12.4 (at which value there is 50% HPO42- and 50% PO43-) and pH=pKa,2= 7.2 (at which value there is 50% HPO42- + 50% H2PO42-) [Cf. Related links: A graph of "The phosphate presency"]
What is the name of hpo4?