Select the best conjugate acid-base pairs for buffer solutionsat the given pH values, and answer the question about bufferpreparation for each case. Use a single "/" to separate the weakacid from its conjugate base. Enter subscripts as ordinary numbers.For ions, put the charge in parentheses. If a charge is greaterthan one, list the multiple first followed by the case.

acid	conjugate base	pKa
CH3CO2H	CH3CO2-	4.75
H2PO4-	HPO42-	7.21
NH4+	NH3	9.25
HCO3-	CO32-	10.33
HPO42-	PO43-	12.32

Part 1

6.85The best conjugate pair for this pH would be:

If you were going to add NaOH solution as part of the bufferpreparation, which component of the conjugate pair would you use inthis case?

H2PO4?(g)+NaOH(s)HPO42?(aq)+Na+(aq)+H2O(aq)

Part 2

10.80The best conjugate pair for this pH would be:

If you were going to add NaOH solution as part of the bufferpreparation, which component of the conjugate pair would you use inthis case?

Transcribed Image Text:

Select the best conjugate acid-base pairs for buffer solutions at the given pH values, and answer the question about buffer preparation for each case. Use a single "/" to separate the weak acid from its conjugate base. Enter subscripts as ordinary numbers. For ions, put the charge in parentheses. If a charge is greater than one, list the multiple first followed by the case. acid conjugate base pka 4.75 7.21 9.25 10.33 12.32 CH3CO₂H CH3CO₂ H₂PO4 HPO42- NH4+ NH3 HCO₂ co₂²- HPO4²- PO4³- Your answer is partially correct. Try again. 6.85 The best conjugate pair for this pH would be: TH2PO4(-)/HPO4(2-) If you were going to add NaOH solution as part of the buffer preparation, which component of the conjugate pair would you use in this case? 2- H₂PO(g) + NaOH(s)→ HPO (aq) + Na (aq) + H₂O (ag) Edit LINK TO TEXT Your answer is partially correct. Try again. I 10.80 The best conjugate pair for this pH would be: HCO3(-)/CO3(2-) If you were going to add NaOH solution as part of the buffer preparation, which component of the conjugate pair would you use in this case? 2- HCO3 (1) + NaOH(s) →CO₂ (aq) + H₂O (aq) Edit Select the best conjugate acid-base pairs for buffer solutions at the given pH values, and answer the question about buffer preparation for each case. Use a single "/" to separate the weak acid from its conjugate base. Enter subscripts as ordinary numbers. For ions, put the charge in parentheses. If a charge is greater than one, list the multiple first followed by the case. acid conjugate base pka 4.75 7.21 9.25 10.33 12.32 CH3CO₂H CH3CO₂ H₂PO4 HPO42- NH4+ NH3 HCO₂ co₂²- HPO4²- PO4³- Your answer is partially correct. Try again. 6.85 The best conjugate pair for this pH would be: TH2PO4(-)/HPO4(2-) If you were going to add NaOH solution as part of the buffer preparation, which component of the conjugate pair would you use in this case? 2- H₂PO(g) + NaOH(s)→ HPO (aq) + Na (aq) + H₂O (ag) Edit LINK TO TEXT Your answer is partially correct. Try again. I 10.80 The best conjugate pair for this pH would be: HCO3(-)/CO3(2-) If you were going to add NaOH solution as part of the buffer preparation, which component of the conjugate pair would you use in this case? 2- HCO3 (1) + NaOH(s) →CO₂ (aq) + H₂O (aq) Edit

Answer rating: 100% (QA)

The best choice of buffer is that one which satisfies the condition below conjugate base acid pHpK l... View the full answer