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madam [21]
3 years ago
10

Calculate the quotient [co32–]/[hco3–] at ph 10.75.

Chemistry
1 answer:
KATRIN_1 [288]3 years ago
3 0

The chemical equation is:

<span>HCO3^    ->  H^+ + CO3^2- </span>

 

We know that the formula for Ka is:
Ka = [H^+][CO3^2-]/[HCO3^-] 


log Ka = log[H^+] + log[CO3^2-]/[HCO3^-] 
pKa = pH - log[CO3^2-]/[HCO3^-] 
log[CO3^2-]/[HCO3^-] = pH - pKa = 10.75 - 10.329 = 0.421 
<span>[CO3^2-]/[HCO3^-] = Antilog (0.421)  = 2.636 </span>

 

Answer:

<span>2.636</span>

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