Experiment 3 Questions
1.
From the results of the solubility test, the identity of your unknown can be
placed into one of two groups, soluble or insoluble. In fact, this test allows
you to narrow down the list of potential unknowns even further. Describe
how the solubility test can be used by a clever observer to separate the
liquids in Table 1 into three different groups rather than just two.

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

An experimental procedure requires a 10 ml of acid to be dissolved

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.