The partition coefficient (logP) is a measure of the equilibrium distribution of a solute between two immiscible liquids, usually water and 1-octanol.

When phenol is behaving as the solute with water and 1-octanaol as the solvents its log P value is 30.2. What does this value say about the relative solubility of a phenol molecule in each solvent liquids? Explain your answer with reference to theory covered in the course regarding miscibility and intermolecular forces. [4 marks]

 Note: in the formula above the equilibrium concentration of a solute S in solvent x is denoted as [S]_x ( e.g. [S]_aq denotes what concentration of a solute is dissolved in the water layer)

The equilibrium constant in terms of concentrations (K_c) for this reaction:

N₂(g)  + 3H₂(g) ⇌ 2NH₃(g)

equals 4.6 × 10^-3. If, at equilibrium, the concentration of H₂ = 5.9 mol/L and the concentration of NH₃ = 2.2 mol/L, what is the equilibrium concentration of N₂(g)?

OUT OF SYLLABUS of CHEM1832

Calculate the value of K_p for the reaction below given equilibrium concentrations of [NO] = 0.0080 M, [O₂] = 0.014 M and [NO₂] = 0.012 M at 299 K:

2NO(g)  +  O₂(g)  ⇌  2NO₂(g)

Your answer must be given to the correct number of significant figures to receive full marks.