The titration of Na2Co3 with HCl has the following qualitative profile: Calculat

Question

The titration of Na2Co3 with HCl has the following qualitative profile:

Calculate the pH at the halfway point B.

This question has multiple parts. Work all the parts to get the most points The titration of 3 with HCl has the following qualitative profile mL HCI his problem requires values in your textbook's specific appendices, which you can access through the OWLv2 Mind ap Reader. You should not use the OWL 2 References' Tables to answer this question as the values will not match.) Ca Identify the major species in solution at points A-F Clear A

Explanation / Answer

a) the point B is one half of the equivalence volume of HCl added to reach first half equivalence point

Here the buffer will have pH [Buffer of Na2CO3 and NaHCO3]

pH = pKa + log [salt] / [acid]

The solution contains equal moles of salt and base

pH = pKa1 = 10.3

b) Half way mid point D, The half way of equivalence of second equivalence point

AGain this is a buffer of NaHCO3 and H2CO3

pH = pKa2 = 6.5

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