An aqueous solution of sodium hydroxide contains 20% naoh by mass. it is desired to produce an 8% naoh solution by diluting a stream of the 20% solution with a stream of pure water. calculate a. the ratios (g h20/g feed solution) and (g product solution/g feed solution). b. the feed rates of 20% solution and diluting water needed to produce 2310 lbm/min of the 8% solution.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

answer; talc and gypsum;