Phosphoric acid is a triprotic acid with the pKa values pKa1=2.148, pKa2=7.198, and pKa3=12.375. You wish to prepare 1.000 L of a 0.0100 M phosphate buffer at pH 7.780. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4, and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? What other combination of phosphoric acid and its salts could be mixed to prepare this buffer? H3PO4 and Na3PO4 H3PO4 and Na2HPO4 NaH2PO4 and Na3PO4 Na2HPO4 and Na3PO4 H3PO4 and NaH2PO4
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
Phosphoric acid is a triprotic acid with the pKa values pKa1=2.148, pKa2=7.198, and pKa3=12.375.
You wish to prepare 1.000 L of a 0.0100 M phosphate buffer at pH 7.780. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4, and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?
What other combination of phosphoric acid and its salts could be mixed to prepare this buffer?
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