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Effect of Solvent on Solubility of Weak Electrolytes in Buffered Solutions

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Effect of Solvent on Solubility of Weak Electrolytes in Buffered Solutions

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Questions and Answers

How does the addition of alcohol to a buffered aqueous solution affect the solubility of a weak electrolyte?

It increases the dissociation of the weak electrolyte.

It has no effect on the solubility of the weak electrolyte.

It decreases the solubility of the un-ionized species.

It increases the solubility of the un-ionized species. (correct)

How does alcohol affect the dissociation of a weak electrolyte in a buffered solution?

Alcohol has no effect on the dissociation of the weak electrolyte.

Alcohol increases the dissociation of the weak electrolyte.

Alcohol decreases the dissociation of the weak electrolyte. (correct)

Alcohol stabilizes the dissociation constant of the weak electrolyte.

How can weakly acidic and basic drugs be brought into solution with the help of surfactants?

By decreasing their polarity

By solubilizing action of surface-active agents (correct)

By increasing their dissociation

By reducing their interaction with solvent molecules

What is one way in which complexation can influence the solubility of a substance?

Produce insoluble complexes Signup and view all the answers

How does particle size affect solubility?

Solubility increases with decreasing particle size Signup and view all the answers

What influence does the configuration of a molecule and crystal arrangement have on solubility?

Unsymmetrical particles are less soluble Signup and view all the answers

What does the true distribution coefficient, K, represent?

The ratio of molar concentration of species common to both oil and water phases Signup and view all the answers

In which phase does benzoic acid only exist as a monomer?

Peanut oil Signup and view all the answers

What factor in the aqueous phase influences whether benzoic acid is unionized or ionized?

pKa of the compound Signup and view all the answers

What determines the concentration of dimer in the oil phase for compounds like benzoic acid?

Type of oil Signup and view all the answers

How is the observed distribution coefficient affected by the total acid concentration used in analysis?

It depends on two equilibria Signup and view all the answers