Question

Liquids might be partially miscible, there are miscible only over a certain range of compositions. Verify this statemen using the following figure! AGART

Answer 1

over a - range ith species Solutions Before verifying this statement "liquids might be partially miscible there are miscible only over a certain range of compositions". - [Xi mote fraction of we should know that I Amix G/ART = Exilnai and fore greater mixing the value of AnixG will be highly regative but as its value approaches to zero on positive (then the liquids are no more longer miscible sie they are immiscible). ORT are more

© -0.3 1.5m -0.4 Now from the graph provided [for Binary Mixture] +0.1 ① If we fix the concentration of liquid A (IM) (lie its moles are fixed) and keep on varying the amount of liquid i so, the mole fraction of a changes (on m e and we can from graph curre @ os as the moles of B Increases mole fraction of a decreases continuously but AGmix/ART first comes to more the value 4 then shift towards Zero ( where maximum miscibility (most ove DmiaG) is at 2A = 0.5 le when both have some no. of moles) and as moles of B Increams further miscibility decreases I Amix G chift towards less are values). 4 to X 6 Now varry the composition this time 1.5m liquid A (more no. of moles present in some volume iic liquid of high conc.) As we Know On dilution miscibility Increases but on increasing conc. istic durt0242 : same observations for curves © & where less miscible due to vorriction in composition ? Portially miscible } But at even higher conc. (curve @) very less miscibility observed or even Sm-ruscible. Hence the nature of graph depending on the value of Arix G/ART explains the statement that liquids might be partially miscible , they are miscible only over a certain range of compositions".