The left ventricular ejection fraction (LVEF) test rate is increasingly used as a quality of care indicator for pa-. tients with heart failure. Our study produced benchmark LVEF test rates in a Medicare fee-for-service.
Toluene is a very good solvent because, unlike water, it can dissolve many organic compounds. In many commercial products, toluene is used as a solvent that is present in paint thinners, nail polish remover, glues, and correction fluid. Toluene has many uses in different industries.
Your solvent choices for this experiment are acetone, ethanol, toluene and water. If a good portion of your solid dissolves at room temperature, then your unknown sample is soluble. Do not use this solvent as a recrystallization solvent.