# Problem: AcidKaCBKbH2CO34.2 x 10-7HCO3-2.4 x 10-8HCO3-4.8 x 10-11CO32-2.1 x 10-4You are to prepare a "carbonate" buffer with pH of 10.35. You are given carbonic acid (H2CO3), sodium hydrogen carbonate (NaHCO3), and sodium carbonate(Na2CO3).H2CO3 + H2O ⇌ H3O+ + HCO3- HCO3- + H2O ⇌ H3o+ + CO3-CO32- + H2O ⇌ HCO3- + OH-a) Using the information in the chart about Ka/Kb values, which species will you use? Explain your choice?b) Which component will be present in the larger amount?c) You are given a 0.025 M solution of the acid and a 0.025 M solution of the conjugate base. Calculate how many mL of each you would use to make the buffer.

###### FREE Expert Solution

The maximum buffering capacity of a solution is when the pH of the solution is equal to pKa and the buffer range of a solution is pH = pKa ± 1

maximum buffering capacity:              pH = pKa
buffering range:              pH = pKa ± 1

Prepare a "carbonate" buffer with pH of 10.35:

a) Using the information in the chart about Ka/Kb values, which species will you use? Explain your choice?

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###### Problem Details
 Acid Ka CB Kb H2CO3 4.2 x 10-7 HCO3- 2.4 x 10-8 HCO3- 4.8 x 10-11 CO32- 2.1 x 10-4

You are to prepare a "carbonate" buffer with pH of 10.35. You are given carbonic acid (H2CO3), sodium hydrogen carbonate (NaHCO3), and sodium carbonate(Na2CO3).

H2CO3 + H2O ⇌ H3O+ + HCO3-

HCO3- + H2O ⇌ H3o+ + CO3-

CO32- + H2O ⇌ HCO3- + OH-

a) Using the information in the chart about Ka/Kb values, which species will you use? Explain your choice?

b) Which component will be present in the larger amount?

c) You are given a 0.025 M solution of the acid and a 0.025 M solution of the conjugate base. Calculate how many mL of each you would use to make the buffer.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Buffer concept. You can view video lessons to learn Buffer. Or if you need more Buffer practice, you can also practice Buffer practice problems.