Sodium chloride

(Un) substituted-2-phenyl-4H-3, 1-benzoxazin-4 one (1, 2) was converted to 3-amino-2-phenylquinazolin-4(3H)-one and its substituted analog under reflux for 6-7 hr with hydrazine monohydrate in ethanol. The concentrated solution was poured into ice cold water to obtain a solid product. The obtained solid was washed with water, filtered, dried and recrystallized from ethanol1. Synthesis of 3-(benzylideneamino)-2-phenylquinazolin-4-(3H)-one 5 (a-j) A mixture of 3-amino-2-phenyl-3H-quinazoline-4-one…

Post-lab: Recrystallization of benzoic acid Calculations: I initially poured 1.10 grams of impure acid into my flask. After the experiment was done, I had 0.54 grams of pure benzoic acid. This gives a difference of 1.10-0.54=0.56 g and a percentage of (0.54/1.10)*100=49.09% The true melting point of pure benzoic acid is 122.41°C and I received 126.9°C as my melting point. This gives a difference of 126.9°C-122.41°C=4.49°C and a percentage of (122.41/126.9)*100=96.46% Results: Impure benzoic…

In our Chemistry class, we the students had performed an experiment that involves with a soda can, being crushed. Going step by step, our group simply placed small amounts of water into the soda can. Then we placed the soda can on a hot surface which allowed the water to boil. Once the water was boiling, our group witnessed the steam coming out from the opening on top of the soda can and one of us picked up the soda can with beaker tongs. We quickly submerged it into cold water and the instant…

The extraction lab began with a .517g mixture of benzoic acid, p-nitroaniline, and azobenzene charged in a 125 mL Erlenmeyer flask mixed with 50 mL of Et2O. Once dissolved, the mixture is transferred the mixture into separatory funnel and begin acid extraction. 15 mL of 3 M HCl is added to the separatory funnel and inverted until a phase boundary is present. An additional 15 mL of 3 M HCl was then added and inverted again. The aqueous layer was removed through the separatory funnel and placed…

inside. After placing the solution on the stir bar, 3.7560 g of (sodium aluminate) was added to the solution. The thermometer was also added to the solution, but it was simply suspended in the solution as to ensure the thermometer did not touch the bottom of the beaker. As this solution heated and the sodium aluminate dissolved, 50 mL of distilled water was placed on an extra hot beaker. Once the water began to boil, 2.6478 g (sodium silicate) was added into the beaker with constant manual…

Sodium bicarbonate (NaHCO3), or sodium hydrogen carbonate, also known as baking soda and bicarbonate of soda, is a soluble white crystalline compound, with a slight alkaline taste resembling that of sodium carbonate. It is found in many mineral springs, in natural deposits in USA and is mainly produced by the Solvay process: NaCl + NH3 + CO2 + H2O NaHCO3 + NH4Cl Sodium bicarbonate, when exposed to an acid, releases carbon dioxide and water: NaHCO3 + HCl NaCl + H2O + CO2 (gas) Above 70°C,…

To first perform this experiment a beaker of water was set to boil on a hot plate while samples of serum and benedicts reagent were collected. Six test tubes were gathered and labeled by which blood vessel the serum was collected from and by which category, either postprandial or fasting. Then by using a metric ruler two measurements were placed on the bottom of each tube, one at one centimeter and one at two centimeters. This was to indicate how much serum and Benedict’s reagent to use,…

PH levels are a measure of how acidic or basic your beverage is. They show what beverages are more acidic, like soda, and what beverages are more basic, like water. It’s measured on a scale from one to fourteen. One through six are the acid levels, seven is the only neutral level, and eight through fourteen are the basic levels. First, get 2 drinks of choice and pour them into two different cups. Then, record its pH level, as well as the room temperature. Next, take another liquid and mix it…

1) Primary standard: primary standard is a highly pure compound which is a reference for identifying the concentration of a known compound in titration. Titrant: in titration; titrant is a solution whose concentration is known. When there is an unknown solution (analyte), titrant is used for identifying the concentration of that unknown by adding titrant to analyte. (using burette) Acid –base indicator: acid- base indicator is an indicator that determines the pH of a solution by changing its…

needed to prepare it, including a 500 ml graduated cylinder, deionized water, and sodium phosphate dodecahydrate as the aqueous solution. The first step is to find the mass of the solution, sodium phosphate. In the formula, sodium's atomic mass is multiplied by 3 because there is the original weight times 3 atoms of sodium in the formula. using this method, calculate the rest of the mass. in total, the mass of sodium phosphate is 164 AMU. then find the mass of dodecahydrate, which comes out as…