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Ttitrating 25.00 mL of 0.0400 M H2A with 0.100 M NaOH solution. Given Ka1= 3.16x10^-3 and Ka2= 5.01x10^-8 for H2A, Answer the following questions:
Just like the Henderson-Hasselbalch equation can be used during the buffer regions, the equation below can be used at the first equivalence point and greatly simplifies the problem.
pH = 1/2 (pKa1 + pKa2)
1. Write out the reactions and the equilibrium expressions associaed with Ka1 and Ka2.
2. Determine the pH at the following volumes of titrat added: A.0.00mL B. 5.00 mL C. 10.00 mL D. 15.00 mL E. 20.00 mL F. 25.00 mL
3. Identify the amphoteric substance in this process.
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