Problem: Consider the acid dissociation behavior of carbonic acid, H2CO3. What is the predominant species present at pH 8.70? a) H2CO3 b) HCO3-c) CO32-Calculate the quotient [CO32-]/[HCO3-] at pH 9.90.

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Part A

predominant specie specie at that pH


pH 8.70 between pKa1 and pKa2


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Problem Details

Consider the acid dissociation behavior of carbonic acid, H2CO3. 

What is the predominant species present at pH 8.70? 

a) H2CO3 

b) HCO3-

c) CO32-

Calculate the quotient [CO32-]/[HCO3-] at pH 9.90.

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