Answer: increase Please explain steps and thoughts on how you got answer 7-8. Th

Question

Answer: increase Please explain steps and thoughts on how you got answer 7-8. The equilibrium constant for dissolution in water of a nonionic compound, such as diethyl ether (CH3CH2OCH2CH30, can be written ether (l) ether(aq) K lether(aq)hether At low ionic strength, y s 1 for neutral compounds. At high ionic strength, most neutral molecules can be salted out of aqueous solu- tion. That is, when a high concentration (typically 1 M) of a salt such as NaCl is added to an aqueous solution, neutral molecules usually become less soluble. Does the activity coefficient, yelher increase or decrease at high ionic strength?

Explanation / Answer

                   As the mole fraction or concentration tends to zero, the behaviour of the mixture more closely approximates to ideal , and so the activity coefficients (of both solute and solvent ) tend to unity in very dilute solutions. Note that in general activity are dimensionless.

                   Modifying mole fractions or concentrations by activity coefficients gives the effective activities of the components, and hence allows expansions such as Raoult's law and equilibrium constants. Constants to be applied to both ideal and non-ideal mixtures.

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