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Look on the equipment for where it says the plus or minus figure for accuracy (for a burette it is usually + and _ 0.1cm3) divide this by the amount you measured , times 100 to make it a percentage. ---- ---- Percentage Error = Maximum Error / Measured Value X 100 For example.
Maximum Error for the following apparatus are:
Balance = +/- 0.01
Pippette = +/- 0.1 And the Measured value for each are:
Balance = 0.15
Pippette = 25 Then...the percentage error is:
Balance percentage error = 0.01 / 0.15 X 100 = 66.66%
Pippette percentage error = 0.1 / 25 X 100 = 0.3% You can now also work out your maximum total error.
Maximum total Percentage error = Balance Percentage error + Pippette Percentage error
Maximum total percentage error = 66.66 + 0.4 = 67.06%
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Define equipment error and explain how to reduce it?
the equipment error is the percentage of uncertainty on the equipment, so for example, a measuring cylinder has the percentage error of around 0.5cm3. The only way I know off to reduce error percentage is to well increase sample size/ volume A etc. as the calculation is something like (equipment error / quantity measured x 100) this would mean that having a higher quantity to measure will therefore decrease percentage error. hope it helps.
How do you calculate percentage error for density of pennies?
Percent error refers to the percentage difference between a measured value and an accepted value. To calculate the percentage error for density of pennies, the formula is given as: percent error = [(measured value - accepted value) / accepted value] x 100.
Write the equation used to calculate percent error?
Percentage error = Value experimental-Value acceptedValueaccepted x 100
How do you calculate total percentage error?
It is 100*(Calculated Value - True Value)/True Value
Instead of multiplying by seven he divided by seven. what is the percentage error?
If you divide by seven instead of multiplying by seven, you are off by a factor of 49. Example, to calculate the percentage: 100 x 7 = 700, 100 / 7 = 14.29. The percentage error is about 98%.
