Answer : The concentration (in molarity) of the unknown solution Q is, 0.265
Explanation :
Using Beer-Lambert's law :

where,
A = absorbance of solution
C = concentration of solution
l = path length
= molar absorptivity coefficient
From the Beer's Law plot between absorbance and concentration we concldue that the slope is equal to
and path length is 1 cm.
As we are given that:
Slope = 0.543 M⁻¹
and,
Slope = 



Now we have to determine the concentration (in molarity) of the unknown solution Q.
Using Beer-Lambert's law :



Therefore, the concentration (in molarity) of the unknown solution Q is, 0.265
<span>3-Methylbutyl propanoate can be synthesized by reacting Propionic Acid with 3-Methylbutanol in the presence of Acid. This reaction is called as Esterification. The synthesis of
</span><span>3-Methylbutyl propanoate is shown below,</span>
Answer:
0.196 M
Explanation:
First, we have to calculate the moles of sodium hydroxide.
moles = mass / molar mass
moles = 3.9280 g / (39.997 g/mol) = 0.098207 mol
It is important to realize that even though 300 mL is the volume of water firstly added to dissolve the hydroxide, the flask is then filled to the mark, meaning that the volume of the solution is 500 mL = 0.500 L.
The molar concentration of sodium hydroxide is:

The concentration is an intensive property, that is, it does not depend on the amount of matter. As a consequence, the concentration of the 50 mL of solution in the buret is the same as the concentration in the flask.