Combustion analysis of 0.300 g of an unknown compound containing carbon, hydrogen, and oxygen produced 0.5213 g of CO2 and 0.2835 g of H2O. What is the empirical formula of the compound?

Question

C2H5O
	C3H8O2
	C2H10O3
	C2H5O2

DrBob222 · Answer

Convert g CO2 to percent C.
Convert g H2O to percent H.
Add %C and %H and subtract the sum from 100 to obtain %O.

Then take 100 g sample which will give you the percents in grams.
Convert gC, gH, and gO to moles. Then find the ratio of each element to the smallest in whole numbers.
Post your work if you get stuck.

TutorCat · Answer

http://preparatorychemistry.com/Bishop_Combustion_Analysis.htm