today we did the molar volume lab!
for homework we made a procedure for the experiment that mr doktor showed us last class and today we carried it out, after going over some questions we had for homework.
in this lab we start by filling the sink with water and measuring the mass of the lighter. once we do that, we place the 100mL graduated cylinder under the water and let all the air bubbles flow out so it is full of water (upside down). then we hold the cheap, NONSEALED (mr doktor didnt spend much on the lighters :P) lighters under the opening in the graduated cylinder and hold the button down so the butane flows out into it up to 10mL. we then measure the mass of the lighter after the butane is released. this is where most problems occured due to the fact that when we released the butane, the water flowed into the lighter, throwing the mass off. using the difference in mass we calculated the molar volume of butane. even though it should have come out to 22.4 L per mole, we came out with 2.9 L. Yeah, just a little bit off. but hey we got to light stuff and see bubbles rise so it was fun and we got to practice some important calculations.
thats pretty much all we did today, as the class was shortened and the lab took up the whole time so there was no lesson otherwise. till next time "show your work and prosper"
wow sorry that was a painfully cheesy ending
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Yes. That was a very cheesy ending. But I'll forgive you. Aside from changing the lighters, how would you modify the experimental design or procedure to ensure a more accurate result?
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