2) compound a is neutral and compound b is acidic. both are water-insoluble solids. a and b are dissolved in dichloromethane (dcm) and extracted with aqueous base. the layers are then separated. what must be done to obtain the compound in the aqueous layer?

(a) acidify and evaporate
(b) acidify and vacuum filter
(c) add sodium sulfate and evaporate
(d) add sodium sulfate and vacuum filter

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.