prepare a phosphate buffer with pH= 7 from solid NaH2PO4 (pKa =7.21) and Na2HPO4.
1) calculate the ratio of [CB]/[acid]
I got the ratio as 0.62
2) calculate the mass of each component required to make 1L of a .1 M buffer solution
3) if the pH is 7.10, how would you adjust it to 7.0?
1) calculate the ratio of [CB]/[acid]
I got the ratio as 0.62
2) calculate the mass of each component required to make 1L of a .1 M buffer solution
3) if the pH is 7.10, how would you adjust it to 7.0?
Answers
Answered by
DrBob222
1. 0.62 is correct.
2. base/acid = 0.62 or
base = 0.62*acid (equation 1)
You want 0.1M x 1 L = 0.1 mol and
base + acid = 0.1 mol (equation 2)
Solve the two equation simultaneously (in which base and acid will be in mols), then convert mols to grams of each.
2. base/acid = 0.62 or
base = 0.62*acid (equation 1)
You want 0.1M x 1 L = 0.1 mol and
base + acid = 0.1 mol (equation 2)
Solve the two equation simultaneously (in which base and acid will be in mols), then convert mols to grams of each.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.