December 22, 2024, 05:41:50 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: The tolerance of a class A 50ml pipet is about +or- 1part per thousand, which i  (Read 9236 times)

0 Members and 1 Guest are viewing this topic.

Offline Jd1828

  • Chemist
  • Regular Member
  • *
  • Posts: 63
  • Mole Snacks: +2/-0
  • Gender: Male
The tolerance of a class A 50ml pipet is about +or- 1part per thousand, which i
« on: June 03, 2005, 11:24:10 AM »
Here is the question:

The tolerance of a class A 50ml pipet is about +or- 1part per thousand,  which is equivalent to +or- X ml.    Where X is the anwser.  

 I put that X= +or- 0.001ml which I guess is wrong.   Can anyone explain why?
« Last Edit: June 04, 2005, 02:56:57 PM by Mitch »
Logged

Offline ksr985

  • Chemist
  • Regular Member
  • *
  • Posts: 67
  • Mole Snacks: +4/-4
  • Gender: Male
  • typee!
Re:Question from my test
« Reply #1 on: June 03, 2005, 03:33:42 PM »
I am not sure exactly what your question means, but my guess wouldve been X= +/- .05 mL.
Logged
i remain, always,
ksr985

Offline Jd1828

  • Chemist
  • Regular Member
  • *
  • Posts: 63
  • Mole Snacks: +2/-0
  • Gender: Male
Re:Question from my test
« Reply #2 on: June 03, 2005, 07:32:25 PM »
The way I read it, It says convert 1ppth to ml.
Logged

Online Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27885
  • Mole Snacks: +1815/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re:Question from my test
« Reply #3 on: June 03, 2005, 07:53:59 PM »
0.001mL is far below the accuracy with which you can read the result from burette. I would suppose that the accuracy of 1 ppt means "maximum accuracy of the titration", so ppt should be multiplied by the maximum volume - 50 in this case. This gives 0.05 mL, as stated by ksr985.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info
Pages: [1]   Go Up
« previous next »
Sponsored Links