What is the percentage error for volumetric/graduated flask!!?

Question

i've done alot of internet research and i'm getting varied answers from 0.15, 0.2 and 0.3. Which is it? please hurry, i have only today to do assignment!

to be more explicit when i say uncertainty, i mean the uncertainty needed to calculate the percentage error. and the flask is 250cm cubed

Answer 1

It depends on the quality of the flask and on it's thickness.

It is often written explicitly in the catalogue.

However, the thickness of the flask is a reasonable guide.

I suggest: Look at the smallest graduation gap on the flask itself e.g. 10 ml. Divide that gap by 5, in this case, giving 2ml.

Then the % error

= (2X100)/250 per cent

= 200/250 per cent

= 800/1000 per cent

= 0.8 %