1.calculate moles of product

2.determine limiting reactant

3.calculate grams of 1,4-dimethoxybenzene

4.calculate mole ratios for reactants

REAGENTS: Reactants: Solvent: Catalysts: 1. Hydroquinone dimethyl ether (1,4-dimethoxybenzene) 2. t-butyl alcohol Acetic acid, 20 ml Conc. Sulfuric acid, 20 ml Calculate the amounts of the reactants required to yield 10.0 grams of 1,4-di-t-butyl- 2,5-dimethoxybenzene assuming a 100% yield. Use this theoretical amount of 1,4-dimethoxybenzene. Use a 30% excess of t-butyl alcohol. When calculating amounts of reactants, round mole values to 4 decimal places, final masses to 1 decimal place and final volumes to whole numbers. APPARATUS: 125 ml Erlenmeyer flask; 50 ml Erlenmeyer flask; 125 ml dropping funnel DIRECTIONS: Hydroquinone dimethyl ether, t-butyl alcohol and acetic acid are placed in a 125 ml Erlenmeyer flask and dissolved on a steam bath. The flask is then cooled in an ice bath until the temperature is 0-3 C. The concentrated sulfuric acid is placed in a 50 ml Erlenmeyer flask and the flask is placed in the ice bath. A 125 ml dropping funnel is positioned over the 125 ml Erlenmeyer flask containing the hydroquinone dimethyl ether solution in the ice bath and the chilled sulfuric acid solution is poured into the dropping funnel. The chilled sulfuric acid is added in slow drops over a period of 15-20 The flask containing the minutes to the hydroquinone dimethyl ether solution. hydroquinone dimethyl ether solution is swirled constantly while remaining in the ice bath. The solid reaction product should have separated at this time and the temperature of the reaction mixture should have risen to 20-25 "C. Swirl the mixture at 25 C for about 5 more minutes and then cool in ice. Add enough ice to decompose the excess sulfuric acid and then fill the flask with water, cool, and filter the crystals by suction using two filter papers. Apply only very gentle suction to avoid breaking the filter paper while filtering the acid solution. Wash with water and then turn on the suction full force. Press down the crystals and allow them to