State and identify the amphoteric substance in the process

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Reference no: EM13205060

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.

Reference no: EM13205060

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