Yield

theoretical yield of acetylsalicylic acid in grams that should be obtained from the synthesis is 3.96 g. The closest experimental yield was obtained without using a catalyst for the reaction; with a yield of 3.67 g (93%) of crude acetylsalicylic acid and a yield of 3.39 g (86%) of recrystallized acetylsalicylic acid. These results are relatively accurate. Similar results were obtained for the experimental yield of the reaction catalysed by concentrated sodium hydroxide; with a yield of 3.38 g…

Therefore, errors in the data obtained were caused more than likely by human error in reading the thermometer or heating the reaction a little longer than past its desired melting point. The percent yield obtained from the experiment was 62.78%. This was calculated by taking the beginning E-stilbene amount which was 0.9 grams of E-stilbene and multiplying it by the molecular weight of the E-stilbene which was 180.245 g/mol. The resulting value was 0…

Introduction: An alcohol can be added across the double bond of an alkene via hydration, which is the addition of a proton and alcohol group to the double bond. This reaction can yield either a Markovnikov alcohol or an Anti-Markovnikov alcohol. If the reaction is carried out in acidic conditions, the reaction yields a Markovnikov alcohol. The mechanism includes the formation of a carbocation intermediate, which has a lower activation energy when it is formed on the more substituted or…

higher than the shelf-price. Through all the pesticides, herbicides, additives, antibiotics and genetic modification, the price for health care will dramatically increase in the future. But in fact, organic farming would boost yields in Africa, Asia and Latin America and the yield increases from converting to organic farming are highest and most consistent in exactly those poor, dry and remote areas where the biggest part of the hungry population lives. Organic farming could play a big role in…

reactant results in the smallest amount for the product is the limiting reactant, and the number itself is the theoretical yield. The theoretical yield is the maximum amount produced from a balanced chemical equation based on 100% efficiency. The actual yield is the amount that is actually produced in lab. To find the percent yield, divide the actual yield by the theoretical yield and multiply that by one hundred. In this lab we will use the steps listed above to find the mass of the precipitate…

in lodging (Hedden, 2003). Table 2 Changes in production input in India, Pakistan and china due to the green revolution adapted from (Wu & Butz, 2004). Changes in Product Quality The green revolution started with the intention of increasing yields and yield stability. However, with time wheat exportation became significant for many countries which makes it competitive on the global market. many importers are very specific on the quality of the product they receive (Trethowan et al., 2007).…

Theoretical Yield = Theoretical moles x Molecular weight of product (g/mol) Example: Theoretical Yield = 0.00597 (mol) x 276.29 (g/mol)= 1.65 g 3. % Yield= (Actual Yield (g)/ Theoretical Yield (g)) x 100 Example: % Yield = (1.65 (g)/ 1.65 (g)) x 100= 100% 4. Rf value = Distance spot traveled (cm) / Distance solvent traveled (cm) Example: Rf value = 1.3 (cm)…

Discussion of the Results and the Scientific Explanation The purpose of this experiment was to identify an unknown compound and discover its properties by devising experimental designs that enable for its identification (Cooper, 2009). Fifteen possible compounds were given, and a series of qualitative tests were used to eliminate the different possibilities and identify the specific unknown compound. These tests included a solubility test, which determines whether the compound is soluble in…

limiting reagent and the actual yield of the product obtained. In the first three trials, Calcium Chloride was the limiting reagent and in the last trial Sodium carbonate was the limiting reagent. The moles of CaCO3 produced for each trial was 0.0008113moles, 0.001188 moles, 0.0004476 moles and 0.0002907moles respectively. The mass of product measured for each trial was 0.0812g, 0.1189g,…

INTRODUCTION 1.1 BACKGROUND Soybean (Glycine max L. Merrill) is a versatile leguminous plant with exceptional nutritional health and benefits. The key benefits are related to their excellent protein content (contains all 8 essential amino acids), high levels of essential fatty acids, numerous vitamins and minerals, isoflavones, and fibre (Dwevedi and Kayastha, 2011). Soybean supplements nearly one-third of the world population with proteins and edible oil (Dogra1et al., 2014). According to…