Awastewater stream is contaminated with 6 weight percent acetic acid and flows into a process at 10,000 kg/hr. prior to release, the level of acetic acid must be reduced to 0.5 weight percent. two solvents are being considered for extraction of the acetic acid: methyl acetate and 1-heptadecanol. the distribution coefficient kd (weight fraction aa in the solvent phase divided by the weight fraction aa in the water phase) for methyl acetate is 1.273. kd for 1-heptadecanol is 0.312. you can assume that both solvents are completely insoluble in water. a)how much of each solvent is required if the extraction is done in a single equilibrium stage? b)which solvent would you choose? provide reasons for your selection.'

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.