Predict Rendement of Product a Reaction


In chemistry, the chemical yield, the yield of the reaction, or only the rendement refers to the amount of reaction product produced in the chemical reaction. [1] Absolute rendement can be written as weight in grams or in moles (molar yield). The relative yield used as a calculation of the effectiveness of the procedure is calculated by dividing the amount of product obtained in moles by the theoretical yield in moles: {\ Displaystyle {\ mbox {fractional rendemen}} = {\ frac {\ mbox {real rendemen}} {\ mbox {theoretical renditions}}}} {\ displaystyle {\ mbox {fractional rendemen}} = {\ frac {\ Mbox {actual rendemen}} {\ mbox {theoretical rendemen}}}} To obtain a percentage yield, multiply the fractional yield by 100%. One or more reactants in chemical reactions are often used redundantly. The theoretical rendement is calculated based on the number of moles of the limiting reagent. For this calculation, it is usually assumed there is only one reaction involved. The ideal chemical yield value (theoretical rendement) is 100%, a value highly unlikely to be achieved in its practice. Calculate the percent of rendemen that is by using the following equations percent rendemen = weight yield / weight of yield divided by the sample weight multiplied by 100%
Example
Calculated the salicylic acid salicylic acid salicylic acid yield: 138 g / mol M: 7 g N salicylic acid = 0.05 mol Mr methanol: 32 g / mol M: 18 g N methanol = 0.56 mol         C7H6O3 + CH3OH C8H8O3 + H2O Initial 0.05 mol of 0.56 mol Reaction of 0.05 mol -0.05 mol +0.05 mol        Remaining - 0.51 mol of 0.05 mol Mass of methyl salicylate = n. Mr.  =                                                            = 7.6 g Test mass = (1.26 - 0.47) g                                                            = 0.79 g Rendement = 100%                                                           =                                                           = 10,39%