Erlenmeyer flask

Jessica Hill CHM 144M Section C Dr. Zhu Charles Dotse Aileen Decker 8 October 2015 The Quantitative Determination of an Acid in Carbonated Beverages Abstract: The basis of this lab was to juxtapose two different titration methods in their ability to identify the end point, calculate the molarity of citric acid in the two sodas, and apprehend the differences between polyprotic and monoprotic acids. In order to accomplish this, a traditional titration, with phenolphthalein, and a modern…

Titrating Vinegar with Sodium Hydroxide (NaOH) Introduction Acids are anions that have at least one hydrogen cation tacked onto their molecular formulas. The Bronsted definition of an acid states that acid is a proton, H+, donor.3 Acids can fall into one of two categories: they can be strong or weak. Strong acids completely dissociate their H+ and weak acids only partially dissociate their H+.3 This means that a strong acid cannot return to its initial state once it undergoes a reaction. On the…

The first experiment that was performed was the oxidation of 9-fluorenol, which is the decrease of a molecule’s hydrogen content.6 The following chemicals were used in the experiment: 9-fluorenol, sodium hypochlorite (the oxidizing agent), sodium thiosulfate (the reducing agent), sodium bicarbonate, acetic acid, and acetone.3,6 To begin the experiment 9-fluorenol, acetone, acetic acid, and sodium hypochlorite were added in sulfate is added to remove excess water from the hexane layer that is…

Gases, solids, and liquids are the three states that a substance can exist as. A gas does not maintain shape and volume. Gases expand to fit and fill the container. While a liquid maintains volume, but not shape and fits the shape of the container it is placed in. Solids can maintain both volume and shape. When a gas exerts force on the walls of a container, this is known as its pressure. Pressure varies based on temperature and volume. Many gas laws were used within this experiment, such as…

more times until there was no more iron present on the magnet. After the final extraction, pour the HNO3 solution into a 100 mL volumetric flask. Rinse the magnet three times with 10 mL of 1.0 M HNO3 and pour each rinse into the volumetric flask. After the three rinses, dilute the volumetric flask to the mark with 1.0 M HNO3. Using another 100 mL volumetric flask prepare 100 mL of a 0.10 M KSCN solution using 1.0 M HNO3 as the solvent. To prepare a 0.10 M KSCN solution, 0.97 g of KSCN was added…

First, we created a mixture of black coffee, sodium carbonate, and ethyl acetate in an Erlenmeyer flask. We used a separatory funnel to separate the caffeine from the coffee, then used a hot…

The purpose of the experiment was to observe limiting reactants by using a fixed amount of one reagent along with a varying the amount of the second reagent used in a chemical reaction. Through these results, the concept of limiting reactants can be determined. Using a graph to demonstrate the relation between the volumes of hydrogen gas produced versus the moles of the reagents will help figure out the stoichiometric balance required. The success of the experiment will be determined by the…

dry container before adding drying agent again & let dry again for 15 min. 8. Weigh a 10 ml Erlenmeyer flask/test tube. Transfer the dry methylene chloride sol. With clean, dry pipette to the flask/test tube, leaving drying agent behind. a. 3-4+ spatulafuls of drying agent was added: rinse NaSO4 with approx. 0.5 ml methylene chloride. Stir with dry spatula & transfer to same pre-weighed flask 9. Heat flask in hot water bath ≈ 45°C a. Faster if stem dry air/nitrogen gas directed at surface of…

Buret was rinsed with water and NaOH, and followed by filling with NaOH solution made in the first week of lab. An acid of unknown concentration was prepared by the instructor and given for analysis. 25.00 mL of the acid was transferred into an Erlenmeyer flask using a volumetric pipette and 2-3 drops of phenolphthalein were added. The resulting solution was titrated with NaOH to achieve the faint pink endpoint and [unknown] was calculated according to the volume of NaOH used. The purpose of…

nitrate. • Copper ions rapidly accelerate the oxidation of sulphite ions. Certain heavy metals may also react in a similar manner as copper. Proper sampling and immediate fixing by acid addition minimize such difficulties. Apparatus (i) Conical flask of 500 ml (ii) Pipette of 5 ml and 10 ml Reagents (i) Sulphuric acid 1+1(distilled water). Dilute 100 ml concentrated sulphuric acid L.R grade to 200 ml with distilled water. (ii) Standard potassium iodide - iodate titrant, 0.0125 M. Dissolve 0…