What is the purpose of the ether extraction

Ether extraction is used in the determination of Uranyl nitrate also known as Uranium.

The extraction of uranyl nitrate depends on partition coefficient ( i.e the ration of equilibrium concentration in the ether layer to the of water layer) following formula is used for the extraction of uranium from ether extraction.

Percentage extracted =  partition coefficient / 1 + partition coefficient) x 100

Temperature, the concentration of salts and nitric acid can also affect the percentage yield of uranium during the extraction procedure.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.