Erlenmeyer flask

added 0.30 g thiamine hydrochloride to a 25-mL Erlenmeyer flask. Dissolved the solid in 0.45 mL of water by swirling the flask. Add 3.0 mL of 95% ethanol and swirl the solution until it is homogeneous. To this solution it was added 0.90 mL of an aqueous sodium hydroxide solution and then it was swirled in the flask until the bright yellow color faded to a pale yellow. Students then swirled the contents of the flask until it was homogeneous. Stopped the flask and was let to stand in a dark place…

I: Introduction: a. background information- Physical Changes are changes that do not involve a change in molecular structure. They can be identified by a change in size, a change in shape, or a change in the state of matter. Chemical changes are changes that involve the re-arrangement of atoms in the molecule. They can be identified by a color change, if a new gas is given off, if a precipitate or new solid forms, and if light, electricity, or heat is given off. b. observations- The observation…

The mass was recorded to the nearest .001 g. The Fluorescein powder was added directly to a 100 mL volumetric flask by folding the weighing paper and sliding the content into the the mouth of the flask. Next, distilled water was used to rinse the weighing paper into the flask. Following this step, the flask continued to be filled with distilled water until reaching the mark. The flask was then capped with parafilm and mixed thoroughly. This new mixture was named Master Solution. Next, the pipet…

water, then the channels of Vernier Pressure Sensor Kit were set up. The clear tubing was connected to the white rubber stopper, the white rubber stopper was twisted into the neck of the Erlenmeyer flask and it was ensured that the two-way valve above the rubber stopper was closed. After that, both the Erlenmeyer flask and the Vernier Pressure Sensor was secured on the ring stand with ring clamps. Once the equipment was set up, the syringe was filled with 3 mL of alcohol and it was put into the…

Introduction The objectives in this laboratory were to explore the titrations of several known acids and bases as well as observing the mole reactions of the chemical reactions that each compound undertook. The four following acids and bases were used to predict when a set amount of reactant would reach equilibrium: Hydrochloric Acid (HCl), H2SO4 (Sulfuric Acid), NaOH (Sodium Hydroxide), and Ba(OH)2 (Barium hydroxide). An unbalanced equation of each reaction was given so the balanced equation…

The cinnamaldehyde and water distillate was obtained from the previous lab session and was observed for changes. The oil was on the bottom of the flask. The distillate turned clear when initially it was white. The distillate still had a cinnamon smell. The cinnamaldehyde was now to be extracted from water using an organic solvent. To choose the right solvent for the experiment, the organic solvent must meet certain criteria. It must be miscible with the substance extracted (in this case,…

The flask was then held in place by a clap within a warm water bath that sustained a temperature of 35–37oC and then covered with a cap. Over a 30-minute period a total of 1mL of HCl within a graduated cylinder was added drop wise into the Erlenmeyer flask. A yellow-orange (ish) solution began to form over this 30-minute period and a purple gas was also slightly noticeable. This gas is iodine that sublimates (changes from solid to gas passing through the liquid phase). The 25mL Erlenmeyer…

lab, a clean 100 mL round bottom flask, 1.002 g of Mg turnings, 4.5 mL of bromobenzene, heating mantle, stir bar, stir plate, water hoses, condenser, and grease were obtained. The bottom of the condenser was greased and connected to the flask. The heating pad was placed under the flask and the stir plate was placed under the heating pad. The water hoses were attached to the condenser and then the water was turned on. Next, the Mg turnings were placed in the flask and the stir plate was turned on…

Introduction In this experiment, the goal was to isolate an organic substance. Using extraction, a basic, acidic, and neutral substance was expected to be extracted from the original unknown compound. Extraction is a process that allows the separation of substances that were previously mixed together through the use of a solvent1. This can be useful in situations where the substance has both the desired product and undesired byproducts in it. In order for extraction to work, the solvent must…

the column to rinse out the Erlenmeyer flask and powder funnel. The solvent was pipetted into the column in a circular motion to get the remaining silica gel off of the walls of the column. The stopcock of the column was opened and the solvent was collected in another Erlenmeyer flask until the solvent level in the column was 1 cm above the silica gel. The collected solvent was a yellow color and therefore not reused. The annatto extract in the 50mL round bottom flask was dissolved in 10%…