Question

points possible: 1.00 determine whether each of the errors listed affects the accuracy of pipets, or can lead to the contamination of pipets. the pipet is not cleaned thoroughly between uses. choose... the liquid level in a pipet is read from the top of the curve rather than the meniscus. choose... air bubbles are present as the liquid is drawn up into the pipet and dispensed. choose... pipets are washed with detergent and then put to use immediately. choose... after the liquid is drained from the pipet, the final drop is pushed through with the pipet bulb. choose... choose... accuracy contamination

Explanation:

1. The pipet is not cleaned thoroughly between uses.

If a pipet isn't cleaned thoroughly between uses, residues from previous liquids can mix with the new liquid, leading to contamination.

Reading the liquid level incorrectly (from the top of the curve instead of the meniscus) leads to an incorrect volume measurement, which affects the accuracy of the pipet's measurement.

Air bubbles take up space, so the actual volume of liquid drawn or dispensed is not what is intended. This leads to an inaccurate measurement.

Answer:

contamination

2. The liquid level in a pipet is read from the top of the curve rather than the meniscus.