(6) For ethyl acetateeutral water, which layer would 4-nitrobenzoic acid be in mainly? (7) For ethyl acetateeutral water, which layer would sodlum 4-nitrobenzoate be in mainly? (8) For ethyl acetateeutral water, which layer would 4-nitrotoluene be in mainly? (9) How is the 4-nitrobenzoic acid isolated from the basic water solution? (give brief outline) (10) If you started with 1.00g of a 1:1 (by weight) mixture of 4-nitrotoluene and 4-nitrobenzoic acid, and after the separation and drying obtained 0.35g of 4 -nitrobenzoic acid, what percent recovery would that represent? (show your calculations) (11) Which of the following represent important observations that should be recorded in any experiment? (change to Bold font all that apply) color changes dissolving of sollds brand of glassware formation of precipitates temperature changes of solutions size of glassware used actual weights and volumes used size of magnetic stir bar used spontaneous bubbling of a solution whether glassware is scratched how you wash glassware