November 2, 2oo9

This class we worked on the

Molar Volume Lab

.

The problem of the lab was to experimentally determine the molar volume of a gas

For homework we had to do the prelab questions. What we found was that the chemical formula for butane is C4H10 and also that the molar mass of butane is 58.124 g/mol.

Also for homework we had to write out a procedure for the lab before doing it, and this is what we wrote:

1. Weigh the lighter on the weigh scale and record it
2. Fill your sink with water, about three inches from the top
3. Place the 100 mL graduated cylinder under water until there are no more bubbles
4. Put the lighter under water at the opening of the graduated cylinder and carefully release butane from the lighter (about 10 mL)
5. Record the volume to the nearest mL
6. Dry the water from the light and then measure the mass of the lighter again on the weigh scale

What we observed during the lab was that after adding the butane gas, the amount of water in the beaker decreased.

Homework: Do analysis and conclusion questions from the lab! =)