How to find the empirical formula for Fructose
Answers
Answer:
Explanation:
The empirical formula is the simplest whole number ratio defining constituent atoms in a species.
In all of these problems it is useful to assume
100
g
of compund, and calculate the ATOMIC composition.
So, in
100
⋅
g
fructose, there are:
40.00
⋅
g
12.01
⋅
g
⋅
m
o
l
−
1
=
3.33
⋅
m
o
l
⋅
C
,
6.72
⋅
g
1.00794
⋅
g
⋅
m
o
l
−
1
=
6.66
⋅
m
o
l
⋅
H
,
53.29
⋅
g
15.999
⋅
g
⋅
m
o
l
−
1
=
3.33
⋅
m
o
l
⋅
O
,
If we divide thru by the smallest molar quantity, we get a formula of
C
H
2
O
.
The molecuar mass of fructose is
180.16
⋅
g
⋅
m
o
l
−
1
. How do we use these data to provide a molecular formula?
Answer:
If we divide thru by the smallest molar quantity, we get a formula of CH2O . The molecuar mass of fructose is 180.16⋅g⋅mol−1 .
Step 1 : Convert the mass percentage into grams. Step 2 : Calculate the number of moles. Step 3 : Calculate the simplest molar ratio: Divide the moles obtained in step 1 by the smallest quotient or the least value from amongst the values obtained for each element.
Explanation:
Empirical formula only shows the ratio of the atoms present in the molecule.
Fructose C6H12O6
Empirical formula (CH2O)
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