Answer to Question #293397 in Organic Chemistry for stella

Question

calculate the vapour pressure of a solvent above a solution containing 83.99g of solute of molecular mass 195 .62per 1000g of water 20°c is 17.53 mmhg

Answer 1

p_H2O=p_H2O^**x_H2O (Raoult's law)

n_H2O=1200/18 = 66.667 mol

n_x = 83.99/195.62 = 0.429

x_H2O = 66.667/(66.667+0.429) = 0.99361

p_H2O=17.53×0.99361 = 17.42 mmhg