Question

question 7 (1 point) listen if a volumetric pipet has 10 ml td +/- 0.01 ml written on it, the user should a) write 5.00 ml as the volume. b) write 10.0 ml as the volume. c) write 10 ml as the volume. d) write 9.99 ml as the volume. e) write 10.00 ml as the volume.

Explanation:

A volumetric pipet with "10 mL TD +/- 0.01 mL" means it is calibrated to deliver (TD) 10 mL with a precision of 0.01 mL. The volume should be reported with the appropriate number of significant figures based on the precision. Since the uncertainty is 0.01 mL, the volume should be reported to the hundredth place (two decimal places) as 10.00 mL to reflect the precision. Option a is incorrect as it's half the pipet's volume. Option b has one decimal place, not enough for the precision. Option c has no decimal places, ignoring precision. Option d is an incorrect adjustment; the pipet is calibrated for 10 mL, not 9.99 mL. Only option e (10.00 mL) correctly reports the volume with the precision indicated by the pipet's calibration.

Answer:

e) write 10.00 mL as the volume.