A student performs the following steps to isolate biphenyl from a solid 1: 1 mixture biphenyl and salicylic acid. a. Dissolve 2.0 grams of the mixture in 20 mL of ether b. Extract the ether layer 2-3 times with an aqueous solution of 5% bicarbonate c. Add 2-3 spatula tips of sodium sulfate to the ether layer d. Extract the ether layer with a saturated aqueous solution of sodium chloride. e. Isolate the organic layer and evaporate the ether. The solid they collect at the end weighs 1.23 g and has a wide melting point range. If student expected to recover 1 gram of pure biphenyl, explain, based on the procedural information given above, why this student did not see their expected results.