Because the H PO and HPO system resists large changes ion pH when acid or base i

Question

Because the H PO and HPO system resists large changes ion pH when acid or base is added, it is called a buffer The phosphate buffer system described previously maintains the pH within cells in your body. Calculate the ratio of hydrogen phosphate to dihydrogen phosphate (A/HA) in a cell with an intracellular pH of 7.4 8. 9. Consider the following diagram. What happens to the pH when a significant amount of base is added? Propose a reasonable explanation for this observation Buffer- a. Base Buffer Capacity Capaty Acid Buffer Volume Base Added (-Voluae Acid Added

Explanation / Answer

Q8

apply:

pH = pKa + log(A-/HA)

substitute known data

pKa = 7.21

pH = 7.40

then

7.4 =7.21 + log(a-/HA)

A-/HA = 10^(7.4-7.21) = 1.54881

A-/HA = 1.54881

Q9

if some base is added, then

pH must increase... util the "buffer" is destroyed, and the pH will increase similar to addition to water, that is, unbuffered

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---