A compound has carbon, hydrogen and oxygen. Use the following data to calculate its empirical formula. In a 100 g sample of the compound the following amounts of each element are present: carbon: 63.15 g hydrogen: 5.30 g oxygen: 31.55 g Show all of the steps of your calculations.
A compound has carbon, hydrogen and oxygen. Use the following data to calculate its empirical formula. In a 100 g sample of the compound the following amounts of each element are present:
carbon: 63.15 g
hydrogen: 5.30 g
oxygen: 31.55 g
Show all of the steps of your calculations.
Determination of empirical formula
The percentage composition of elements present in given compound is determine by quantitative analysis. Generally the percent composition of oxygen is found as
% of oxygen = 100 – sum of % of all other element
The percentage of each element is divide by respective atomic mass . This give the atomic ratio of constituent atom present in given compound
The simplest ratio is found by dividing all atomic ratio by smallest atomic ratio . If any fractional ratio obtained then it is converted into whole number ratio by multiplying with suitable integer
The formula that show the smallest ratios of the number of atoms of each element represent the empirical formula.
Molecular formula = n x empirical formula
Where ,
n = Molecular mass/empirical formula mass
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