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Topic: The tolerance of a class A 50ml pipet is about +or- 1part per thousand, which i  (Read 9235 times)

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Offline Jd1828

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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 »
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Offline ksr985

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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.
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Offline Jd1828

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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.
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Offline Borek

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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.
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