Lab 8: Mole Baggie Lab

Lab 8: Mole Baggie Lab

The purpose of the mole baggie lab was to understand the connections with mass, moles, and molar mass. In the mole baggie lab we had to calculate to molar mass of the mysterious compounds in the two given plastic bags to find out what each substance was. For each plastic bag there was certain amount of information given and with that we had to find the substance. We were first given all the possible compound that the substance in the bag could be and we calculated the molar mass of all possible compounds.

A4 is Calcium Carbonate (CaCO3)!

For the first baggie, Vedika and I had bag A4. The mass of the actual bag was 2.57g which was labeled on the bag. We found the mass of the bag and the mystery contents inside which was 6.6g. To find the mass of the mystery substance we had to subtract the weight of the bag to get 4.03g. 
We then divided the number of moles labeled on the bag as 0.040 moles and we found the molar mass which was 100.75 g/mol. The molar mass of calcium carbonate is 100.0869g/mol which means the mystery substance was calcium carbonate!

B1 is Sodium Sulfate (Na2SO4)!

For the second baggie, we had bag B1. The mass of the actual bag was 2.60 g so we subtracted it from the mass of the mystery substance which was 9.0 g resulting in 6.4g. The moles were not shown but the representative particles, we had to calculate it by taking that number which was 2.71 x 10
^22 and divided it by 6.02 x 10^23 and we got .045 moles. We then divided the mass of the mass of the substance which was 6.4g by .045 moles resulting in 142.22 g/mol. The molar mass of sodium sulfate is 142.04 g/mol which means the mystery substance was sodium sulfate. 


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