the volu me relmadIIs CUnStunt. Istu. Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution that is 0.25 M in formic acid (HCO,H) and 0.50 M in sodium formate (HCO,Na). 18.69 Use the Henderson-Hasselbalch equation to calculate the ratio of H,CO3 to HCO3 in blood having a pH of 7.40.

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Can you please answer sub question A and B and show all of the steps to the solution please and thank you 

A the volume relmams
s CUIIstunt.
Use the Henderson-Hasselbalch equation to calculate the
pH of a buffer solution that is 0.25 M in formic acid
(HCO2H) and 0.50 M in sodium formate (HCO,Na).
15.69 Use the Henderson-Hasselbalch equation to calculate the
ratio of H2CO3 to HCO3 in blood having a pH of 7.40.
Transcribed Image Text:A the volume relmams s CUIIstunt. Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution that is 0.25 M in formic acid (HCO2H) and 0.50 M in sodium formate (HCO,Na). 15.69 Use the Henderson-Hasselbalch equation to calculate the ratio of H2CO3 to HCO3 in blood having a pH of 7.40.
Expert Solution
Step 1

Solution, which resist in pH change value upon addition of small amount of strong acid or base (less then 1%) is known as buffer solution

Acidic buffer  An acidic buffer solution consist with solution of weak acid and its salt.

Basic buffer - A basic buffer solution consist with solution of weak base and its salt. 

Step 2

Given information:

Concentration of formic acid HCO2H0.25 M

Concentration of sodium formate HCO2Na0.50 M

pKa of formic acid = 3.75

Solution consist with weak acid HCO2H formic acid and its salt HCO2Na sodium formate. Therefore, the mixture is an acidic buffer solution.

From Henderson- Hasselbalch equation for acidic buffer solution:

pH =pKa + log  concentration of saltconcentration of acid

Substitute, 3.75 pKa, 0.50 M concentration of salt and 0.25 M concentration of formic acid in the expression:

pH =3.75 + log 0.50 M0.25MpH = 3.75 + log 2       4.05

Therefore, the pH of the solution mixture of formic acid and sodium formate is 4.05.

 

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