200 mg of impure sucrose was weighed out. After recrystallization from water, 225 mg of solid compound was obtained. What happened? How can this be corrected?
Obviously you cannot have a greater mass after recrystallization, so what could have happened to result in this increase in mass? Since there is nothing present other than the original sample (200 mg) and water, it appears that there is now water associated with the final product. If the final recrystallized product is not completely dry, this will add to the mass.