[Hanz_a93]

Here are the questions:

Calculate the percentage uncertainty associated with the volume of sodium carbonate which you have transferred using a pipette (uncertainty associated with reading a 25cm3 class B pipette is 0.06 cm3)

Calculate the percentage uncertainty associated with your average titre (uncertainty associated with each reading of a 50cm3 class B burette is 0.05cm3) My average titre reading was 23.7

[Nirgilis]

Percentage Uncertainty = (Absolute Uncertainty / Measured Value) x 100

Therefore:

% for pipette = (0.06 / 25) x 100 = 0.24%


% for burette = (0.05 / 23.7) x 100 = 0.21%

[hazbaz]

yarghan

[ERdoctor]

(Original post by Nirgilis)
Percentage Uncertainty = (Absolute Uncertainty / Measured Value) x 100

Therefore:

% for pipette = (0.06 / 25) x 100 = 0.24%


% for burette = (0.05 / 23.7) x 100 = 0.21%

Do you not multiply the second one by two (assuming the calculation for average titre was made from two values)? Sorry for re-awakening a 2 year old thread.

[charco]

(Original post by ERdoctor)
Do you not multiply the second one by two (assuming the calculation for average titre was made from two values)? Sorry for re-awakening a 2 year old thread.

yes, you do.