Stoichiometry

In order to calculate the percent yield, we first had to determine the moles of the limiting reactant, which was anthranilic acid in this case, by dividing the mass of was anthranilic acid we weighted in the beginning of the lab (2.001g) and dividing it with the molar mass of was anthranilic acid. Thus obtaining the value of 0.01456g. Then in order to calculate the theoretical yield, we multiplied the moles of was anthranilic acid with the molar mass of N-acetylanthranilic acid and the mole ration

Table 9: Selectivity data for caffeine, methyl paraben, butyl paraben and ibuprofen. Interfering peak PA interference 1 % Interference 2 Caffeine Yes 1454.6 3.9% Methyl paraben No Butyl paraben No Ibuprofen No 1 Average peak area of the interfering peak. 2 % Interference=(〖PA〗_interference/〖PA〗_LOQ )100. 5.2.2 Linearity: The linearity was demonstrated for all the analytes in each corresponding range of analysis, the r2 values ranges from 0.9994 for caffeine to 1 for butyl paraben. Figure 34

What is Stoichiometry? In Chemistry, calculations that relate different quantities of substances (eg. Mass, Moles) are involved in Stoichiometry. Stoichiometry is a study involving measurable or quantitative relationships that exists in chemical reactions. The term was derived from Greek word stoicheion meaning element and metron as measure. The topic focuses on the relationships between moles, mass and particles. Mole is a unit that defines the amount of a substance that contains different chemical

STOICHIOMETRY There is no Chemistry without Stoichiometry. It is nothing but calculations using fundamental concepts of balanced chemical equations and using reactant-product mole ratio. If mass or gaseous volume of one of the reactants or products in a chemical reaction is known, mole(s) or mass or gaseous volume of a reactant or product can be calculated involving the mole ratio of a chemical equation. Before understanding Stoichiometry Chemistry, we need to know certain relationships among

Discussion: There are numerous ways of isolating and purifying a substance, and an investigation of the differences of each procedure were performed. In two different procedures, lead nitrate and potassium iodide were used to isolate and purify pure solid lead iodide, and the differences in the limiting reactant and solid lead iodide was observed. The amount of solid lead iodide was calculated by the measuring the mass of which the solid lead iodide was created in before and after the purification

Abstract Acetic Anhydride and p-Aminophenol were heated in a vial attached to an air condenser to synthesize crude acetaminophen, resulting in 0.097 grams (47.48% yield). The crude acetaminophen was then recrystallized in a solvent of water and methanol over heat resulting in 0.082 grams (39.61% yield) of pure acetaminophen. Melting points of both crude and pure acetaminophen were taken, and found to be 165.9 - 170.9°C and 168.2 - 171.5°C, respectively. The literature melting point of acetaminophen

Calculation of Product Distribution of 2-Bromopentane and 3-Bromopentane Amount of Product:.631g 2-Bromopentane(Hydrogen G) Integration:.78 3-Bromopentane(Hydrogen F)Integration:.28 Mole Ratio of 2-Bromopentane to 3-Bromopentane: .78/.28=2.79 which is ~3:1 ratio .75 x .631= .47g 2-Bromopentane .25 x .631= .16g 3-Bromopentane This shows that 2-Bromopentane is the major product. Figure 3: NMR spectrum for the product of 1-propanol and NaBr/H2SO4. In Figure 3, the NMR spectrum that was produced

To determine each solution's freezing point certain methods and materials were used. First, two weighing boats were labeled NaCl and CaCl2. Each weigh boat was placed on the scale to calculate the initial weight of the boats. 2.0g of sodium chloride was added to the boat labeled NaCl and reweighed. The same was done for CaCl2, then the freezing point apparatus was assembled. Using a 600mL beaker filled with ¾ full of ice, the remainder of NaCl was poured into the beaker and mixed. The thermometer

In this experiment, the solid copper metal was weighed to get the initial mass to later compare the mass to the copper after all the reactions. The copper was put into a 250 ml beaker under the fume hood in order to measure excess amounts of 15.8 M nitric acid, HNO3 because the copper has to be the limiting reactant in order to change the state of matter of the copper. It needs to be aqueous instead of a solid. (Cu(s) + 4 HNO3 (aq) -> Cu(NO3)2 (aq) + 2 NO2 (g) + 2 H2O (aq)). After the reactants

RESULTS Yield: Assuming a reaction that uses up 100% of the cyclohexanone reagent, the theoretical yield is 2.32g. This could be calculated using the following calculation. The 1:1 ratio of moles cyclohexanone to moles bisphenol Z comes from the mole ratio in the reaction scheme. 1.00g cyclohexanone×(1 mol cyclohexanone)/(98.15g cyclohexanone)×(1 mol bisphenol Z)/(1 mol cyclohexanone)×(228.29g cyclohexanone)/(1 mol cyclohexanone)=2.32g bisphenol Z The actual reaction yielded 0.72g of pure bisphenol