Chemical Uncertainty

Question 1

How to calculate uncertainty

Answer 1

0.5 * range

Write answer like +/- (0.5*range) about the mean

Question 2

Percentage uncertainty

Answer 2

(0.5*range )/mean then *100

Answer with %

Question 3

Precise meaning chemistry

Answer 3

Results have very little spread about the mean value. Depends only on the extent of random errors - gives no indication of how close results are to the true value