What is the uncertainty of a 1ml pipette?
In general, the uncertainty of a measurement is determined by the precision of the measuring device. A 1-ml pipette with a graduation of 0.01mL with give an uncertainty of + 0.001, or 10% of the smallest graduation (10% • 0.01 = . 001).
What is the uncertainty of a pipette?
Uncertainties for Volumetric Glassware
| Item | Volume (mL) | Uncertainty (mL) |
|---|---|---|
| Transfer pipette “To Deliver” | 2.000 | ±0.006 |
| 1.000 | ±0.006 | |
| Mohr (graduated) pipette | 10.00 | ±0.05 |
| Volumetric flask | 1000.0 | ±0.30 |
What is the uncertainty of a 10ml volumetric pipette?
To find the uncertainties and approximate number of significant figures when using volumetric glassware use Table 1. Table 1. Capacity Tolerances for Class A Volumetric Glassware. A 10-ml pipet is listed as 10.00 0.02, which is close enough to 4 significant figures, 10.00 ml.
What is the precision of a 10 mL volumetric pipette?
volume 10 mL, accuracy: 0.02 mL.
What is the uncertainty of a 5 mL pipette?
03. Uncertainty for Volumetric Glassware
| Glassware | Volume in mL | ± Uncertainty in mL |
|---|---|---|
| Volumetric pipets | 1.00 5.00 10.00 25.00 | 0.01 0.01 0.02 0.03 |
| Volumetric flasks | 50.00 100.00 250.0 | 0.05 0.08 0.10 |
| Buret | 50.00 100.00 | 0.05 0.10 |
| Erlenmeyer flasks | 100 250 | 5 10 |
How do you find the percent uncertainty of a pipette?
Pipette (Class B) A 25 cm3 pipette has a maximum error of 0.06 cm3 0.06 ÷ 25 = 0.0024 0.0024 x 100 = 0.24%.
What is the uncertainty of an instrument?
The “overall” uncertainty in a measurement is the larger value of the two (instrumental or sample). This value is often referred to as the uncertainty in a measurement.