Volumetric flask

we added at a time which could have led to our last titrations being more accurate than our firsts. Another error that was possible was contaminated. We used the same volumetric flask to complete each trial, which meant we had to clean and rinse the flask with DI water. There was a chance that we did not completely dry the flask out completely and the residual DI water was left to mix with the water…

heating a 100mL beaker filled with water. Place the test tube into the hot water bath for about 10 minutes. When hydrogen gas stops forming and the solution is pale green, then stop heating the beaker. 7. Transfer the solution to a 100mL volumetric flask and dilute the solution to 100mL. 8. Create standard Fe2+ solutions (1, 2, 4, 5, and 8 ppm): a. To create 1 ppm use 1.0mL of a 10ppm Fe 2+ solution into a test tube with a mark at the 10mL line. b. Add two drops of 6.0M HCl(aq), 0.5mL…

substances until it is dissolved, then transfer the solution to a volumetric flask. Using distilled water to rinse of the beaker and the glass rod repeat this for 2-3 times. Furthermore, add water insure that it is below the line on the volumetric flask. Add the final few drops with a teat pipette to ensure that all the bottom of the meniscus is on the line. Lastly, to finish this procedure place the lid on the flask and turn the flask over for few times so that all the solution is mixed…

to be 0.0009946 M of Fe3+. The acid was made from diluting 41.3 mL of concentrated HCl in a 500 mL volumetric flask. Due to the large amounts of samples and standards, the acid solution was made multiple times. Saturated Potassium Thiocyanate Saturated potassium thiocyanate was made in 100 ml volumetric batches. The solution was made from continuous addition of potassium thiocyanate to the flask until it stopped to dissolve in the solution. Since each batch of saturated solution contains…

apparatus included 250mL distillation flask, a 100ml receiving flask, a condenser for water to run through, and a thermometer to monitor the temperature. The measurements of the empty flasks were 37.5120g for the distillation flask and 31.1978g for the receiving flask. The mass of the unknown liquid mixture was determined by transferring the mixture into the distillation flask and subtracting the initial…

The purpose of this experiment was to evaluate the stoichiometric relationship between the testing agents and to identify the products formed. The relationship was found by completing three acid and base neutralization reactions using phosphoric acid, which is a triprotic acid, with different volumes of sodium hydroxide. Introduction When looking at the coefficient of balanced equations, stoichiometry is seen. Coefficients represent the number of moles, equivalent to the mass of an atom, of…

Antacids are essential in science and everyday life. They work to neutralize an acid in a reaction. Antacids are bases and the chemistry definitions of a base vary. A base is defined as a substance that produces OH- ions in solution in the Arrhenius definition. There is also the Bronsted Lowry definition and the Lewis definition. They are defined as the following respectively: a proton acceptor or H+ ion acceptor and an electron pair donor. These terms are used interchangeably to figure out if…

The following materials were gathered for the experiment: mortar and pestle, 50 mL titration burette, clamp stand, 250 mL beaker, 100 mL volumetric flask, filter paper, 10 mL bulb pipette, and five 50 mL beakers. After the titration burette was set up in the clamp stand, 50 mL sodium hydroxide (NaOH) with a concentration of 0.25 M was poured into the titration burette. The weight of the Gelusil…

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…

Brooke Beams February 2, 2012 Experiment 1 Determination of the Components of a “Mixed Drink” INTRODUCTION. For this experiment standard solutions of Kool-Aid flavors will be prepared to measure the absorbance at lambda max and plot the results against the concentration of solution to generate a standard curve. Then it must be determined the amount of each flavor in a sample of the unknown by comparison to your standard curves. The ingredient in each flavor of the Kool-Aid that…