In the Grignard reaction. The benzoic acid product (abbreviate PhCO2H) was separated from the impurity biphenyl (abbreviated Ph-Ph) through an extraction with aqueous NaOH which deprotonated benzoic acid and converted it into sodium benzoate (abbreviated PhCO2Na). After the Grignard reagent, phenylmagnesium bromide was mixed with CO2, it was mixed with additional ether and 6M H2SO4. This gave a two phase liquid mixture. The upper layer was separated and extracted with 5% NaOH solution to give another two phase liquid mixture. What was dissolved in the top layer