Molar

purposes of the lab were to determine the percent by mass of acetic acid in vinegar and to determine the molar concentration of a strong acid. In both parts of the experiment a volumetric analysis was used. This is primarily the aid of volumetric glassware in order to determine specific measurements and calculations. Potassium hydrogen phthalate was used as the primary acid standard to determine the molar concentration of the sodium hydroxide solution in part one of the experiment. It was known…

The procedure of the experiment includes two parts: 1. Determination of the Freezing Point of Glacial Acetic Acid: to record the temperature of acetic acid every 30 seconds until it reach 300 seconds (5 minutes). 2. Determination of the Molar Mass of an Unknown Compound: to record the temperature of the mixture between unknown solid and glacial acetic acid. After that, put the ice-water mixture into the tube and record the temperature every 30 seconds. Pre lab questions: 1. Solute: dissolved…

grams. As we move on to the second part of part A my partner and I prepare HCl solution and record its molar concentration at 0.1 ml. We were also able to figure out the volume of the HCl, which turned out to be 25 ml. After we were able to successfully dissolve the antacid my partner and I had to analyze the antacid. After my partner and poured the NaOH solution into the buret we recorded its molar concentration, which turned out to be 0.1. After we heated the solution it turned blue. After…

Aprons and goggles on. Clean a 1000-mL beaker for use as a heating bath. Set the beaker on a hot plate and begin heating. 2. Clean and completely dry the Erlenmeyer flask. 3. Cut a square of aluminum foil to serve as the cover of the flask. Trim the edges so that it neatly covers the edge of the flask. 4. Weigh the empty flask with cover and record to as many sigfigs as possible. 5. Obtain your unknown liquid and record the ID #. Add 3-4 mL of the liquid to the flask. Re-cover…

The absence of a sealant was not considered as a failure of the sealant.1204 sealants placed in 148 patients with an average age of 21.4 years was investigated. 477 of the sealants were placed in premolars, 501 in first permanent molars, and 226 in second permanent molars. Gender was fairly balanced with 52% female and 48% male subjects. Patients were categorized into different restoration profiles based on the number of restorations per patient placed in both the primary and permanent dentition…

moles, m is the given mass of a substance in grams, and M is the molar mass of…

to crush food into smaller surface area. This is necessary, as it will create a larger surface area for the enzymes to work on the food (in-text citation). There are 4 types of teeth: incisors, canines, premolars and molars. There are 4 incisors, 2 canines, 4 premolars and 4 molars on both the upper and lower jaw. The arrangement of each type of tooth is shown on Fig.1 (in-text citation). Each types of tooth also have different shapes and functions. Incisors are chisel shaped. It is used for…

Titration is used to determine the equivalence point of a reaction, or the point when the moles of acid are equal to the moles of base in a mixture. Titration is used to determine the concentration of an unknown solution by using an already known solution. This process is important because it is commonly in the medical field. For example, pharmacists use titration in the creation of drugs. In addition, doctors also titration when determining the concentration necessary to give their patients of…

2. The gas phase catalytic oxidation of benzene reactor model and evaluation of the parametric sensitivity To illustrate the parametric sensitivity analysis, the case of gaseous phase catalytic oxidation of benzene to maleic anhydride was considered (Lupușor et al., 1981). The multi-tubular reactor (heat exchanger type) with the fixed bed catalyst inside a small diameter tubes (under 3 -4 cm) is continously cooled by molten salt mixture (nitrates and nitrites mixture; Maria , 2007). The raw…

area closest to the lips is called the labial surface. The back teeth also know as the molars and premolars is the area that faces the cheeks and it is called the buccal surface, and the biting or chewing area is called the occlusal surface. There are all kinds of different types of permanent teeth, each with there own specific function. There is Central Incisors, Lateral Incisors, Canines, Premolars, Molars, and the Wisdom teeth all in witch are placed in a different location in the mouth.…