Which gives the more concentrated solution, stearic acid [CH₃(CH₂)₁₆COOH] in (a) H₂O or (b) CCl₄? Explain.

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23-08-2022
Chemistry

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Which gives the more concentrated solution, stearic acid [CH₃(CH₂)₁₆COOH] in (a) H₂O or (b) CCl₄? Explain.

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pankajpal6971 pankajpal6971 · Answer 1 · 2022-08-27T05:26:44+02:00

In CCl₄ stearic acid [CH₃(CH₂)₁₆COOH] gives the more concentrated solution.

Solubility of carboxlic acid

Carboxlic acid is soluble in both polar solvent such as water and in non polar solvent such as hexane.

The Carboxlic acid have both both non polar and polar ends. They can form hydrogen bond by using hydroxyl end. These bonds are much stronger than hydrogen bond in water. Therefore, they replace them. Thus, they are soluble in water.

As the size of hydrocarbon in carboxlic acid increases the solubility in water decreases.

Since, we see thta hydrocarbon part is large in stearic acid So it is less soluble in water.

More will be the solubility, more will be the concentration of the solution.

As the size of hydrocarbon increases more will be dipole induced dipole interaction with CCl₄ molecules. We can say that CCl₄ acts as induced dipole part and hydrocarbon which is non polar act as dipole part. Hence, the solubility of stearic acid in CCl₄ is more.

Thus, we concluded that stearic acid make more concentrated solution in CCl₄ than in water.

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