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Burning Lactic acid in Oxygen? Help please?!

Question from my Chemistry homework:

"If 0.0750g of lactic acid were burned completely in oxygen, what volume of carbon dioxide (measured at room temperature and pressure) will be produced?"

How would I work this out, please?

Reply 1

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Reply 2

Protoxylic

Have you covered gas laws and the ideal gas equation?

Reply 3

john_jomcy98

Original post by ellie.b_97

Question from my Chemistry homework:

How would I work this out, please?

Well, Firstly I hope you were given the formula for Lactic acid.

Well this is how I would solve this if I had the formula for lactic acid:

Formula: C3H6O3 + 3O2 ------> 3CO2 + 3H20

The Ratio between C3H6O3 : CO2 ---> 1:3

C3H6O3: Moles=Mass/MolarMass = 0.0750/90.06=0.000834 moles

Therefore, Number of moles of CO2 = 0.000834 X 3 = 0.00250 moles

CO2: Volume=Moles X 24dm3 = 0.00250 X 24 = 0.06dm3 or 60cm3 :smile: