Calculate the pH and the equilibrium concentrations of H₂PO4, HPO42- and PO4³- in a 0.0960 M aqueous phosphoric acid solution. For H3PO4, Ka1 = 7.5x10-3, Ka2 = 6.2x10-8, and Ka3 = 3.6x10-13 pH = [H₂PO4] = [HPO4²-] = [PO4³-] = 3 M M
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.
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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.
![**Problem Statement:**
Calculate the pH and the equilibrium concentrations of \( \text{H}_2\text{PO}_4^- \), \( \text{HPO}_4^{2-} \), and \( \text{PO}_4^{3-} \) in a 0.0960 M aqueous phosphoric acid solution.
**Given Data:**
For \( \text{H}_3\text{PO}_4 \):
- \( K_{a1} = 7.5 \times 10^{-3} \)
- \( K_{a2} = 6.2 \times 10^{-8} \)
- \( K_{a3} = 3.6 \times 10^{-13} \)
**Required Calculations:**
- **pH =** [Calculation required]
- **Equilibrium Concentrations:**
- \( [\text{H}_2\text{PO}_4^-] = \) [Calculation required] M
- \( [\text{HPO}_4^{2-}] = \) [Calculation required] M
- \( [\text{PO}_4^{3-}] = \) [Calculation required] M
**Instructions for Solving:**
To determine the pH and equilibrium concentrations, consider the sequential ionization of phosphoric acid and use the provided \( K_a \) values for each ionization step. Start by calculating the concentration using the first ionization step and adjust for subsequent equilibria using \( K_{a2} \) and \( K_{a3} \).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9aca1772-1e0c-4e24-86a8-736d39b6760d%2Fa170c0f7-861b-4315-8c2e-aca4345d3b9a%2F2vyea4m_processed.jpeg&w=3840&q=75)
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