A Combustion Apparatus vaporizes a sample into gases to later determine its formula.
Concept #1: Combustion Apparatus
Example #1: The compound that makes up an experimental jet fuel contains C, H and O. Suppose that in one experiment the combustion of 11.5 g of the liquid gave the following results:
Mass of CO2 absorber before combustion = 10.815 g
Mass of CO2 absorber after combustion = 32.815 g
Mass of H2O absorber before combustion = 10.110 g
Mass of H2O absorber after combustion = 23.610 g
Find the empirical formula of the unknown liquid.
Practice: Vitamin C (MW = 176.12 g/mol) is a compound containing C, H, and O found in citrus fruits. When a 1.000 g sample of Vitamin C is placed inside a combustion chamber and burned, the following information is obtained:
Mass of CO2 absorber before combustion = 83.85 g
Mass of CO2 absorber after combustion = 85.35 g
Mass of H2O absorber before combustion = 37.55 g
Mass of H2O absorber after combustion = 37.96 g
What is the molecular formula of Vitamin C?