Ethyl alcohol in the solvent CCl₄ forms a hydrogen-bonded complex with an equilibrium constant K_eq = 11.

(a) What happens to the concentration of the complex as the concentration of ethanol is increased? Explain.

(b) What is the standard free-energy change for this reaction at 25°C?

(c) If one mole of ethanol is dissolved in one liter of CCl₄, what are the concentrations of free ethanol and of complex?

(d) The equilibrium constant for the analogous reaction of ethanethiol is 0.004. Which forms stronger hydrogen bonds, thiols or alcohols?

(e) Which would be more soluble in water: CH₃OCH₂CH₂SH or its isomer CH₃SCH₂CH₂OH? Explain.

Transcribed Image Text:

2 C₂H5OH C₂H₂O:--H-Ö H C₂H5