Question

Jenny completes a lab experiment requiring her to measure 32 milliliters (mL) of liquid. She uses a 50 mL graduated cylinder to measure this amount. Sandra completes the same lab, but uses a 25 mL graduated cylinder two times to measure out the required 32 mL of liquid. Upon completing the lab, Jenny's results are closer to the actual value than Sandra's. Explain why this might be.

Answer 1

Because if you measure the 32 ml using the 25ml flask you need to measure 25 ml out, pour it into another container before measuring the remaining 7 ml, when you do this you always have some left behind in the flask that sticks to the walls of the flask. So Sandra will lose approximately twice as much due to loss in measuring as Jenny- who only measured once in a bigger flask.

Answer 2

Thank you.

Answer 3

np;)