\1. (a) Show that s, the density of a slurry made up by combining a solid and a liquid is given by s = 12 2x1 + 1(1 x1) Where 1 is the density of the solid 2 is the density of the liquid x1 is the mass fraction of solids in the slurry Assume that the volumes are additive i.e. the volume of the slurry is the sum of the volume of solid and the volume of liquid.

1. (a) Show that s, the density of a slurry made up by combining a solid and a liquid is given by s2x1+1(1x1)12 Where 1 is the density of the solid 2 is the density of the liquid x1 is the mass fraction of solids in the slurry Assume that the volumes are additive i.e. the volume of the slurry is the sum of the volume of solid and the volume of liquid. (7 marks) has a density of 3.0gcm3. The density of water is 1gcm3. (3 marks) May 2012 2. (i) Discuss, using appropriate examples and diagrams if necessary, the concept of recycle and bypass in the design of a chemical process. (3 marks) (ii) Discuss the need for h the purge steam? Wh