Question 1
At 20 °C, an aqueous solution that is 24.0% by mass in ammonium chloride has a density of
What is the molarity of ammonium chloride in the solution? The formula weight of NH
4Cl is
◦ 5.90
◦ 0.479
◦ 4.79
◦ 0.0445
◦ 22.5
Question 2
At a given temperature the vapour pressures of benzene and toluene are 183 mmHg and 59.2 mmHg, respectively. Calculate the total vapour pressure over a solution of benzene and toluene with
xbenzene = 0.580.
◦ 106 mmHg
◦ 121 mmHg
◦ 131 mmHg
◦ 242 mmHg