A reaction produces 0.755 mol of H2O. How many molecules of water are produced?
1 answer:
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Volume of the solution =
= 2 L solution x
Volume of solute = 7.5 mL
Volume of water (solvent) = 2000 mL - 7.5 mL = 1992.5 mL water
Explanation:
The given data is as follows.
= 211 nm,
l = 1 cm, 7% < Transmittance < 85%
Suppose the aqueous solution follows Lambert-Beer's law. Therefore,
Absorbance =
Hence, for 7% transmittance the value of absorbance will be as follows.
Absorbance =
= 1.155
For 85% transmittance the value of absorbance will be as follows.
Absorbance =
= 0.07058
According to Lambert-Beer's law.
A =
where, A = absorbance
= molar extinction coefficient
C = concentration
Therefore, concentration for 7% absorbance is as follows.
=
=
= 0.187 mmol/L
Concentration for 85% absorbance is as follows.
=
=
= 0.01144 mmol/L
Thus, we can conclude that linear range of phenol concentration is 0.01144 mmol/L to 0.187 mmol/L.