Calculation, percent yield

Use fJ = luf V to calculate amounts of each ion present in the two solutions before mixing, and determine which is limiting. Then solve for the theoretical yield, and apply Equation to calculate percent yield. 

B the calculated percent yield of product will be less than 100%... 

Equations used to calculate percent yield or dilution ratios A list of disposable equipment (e.g., rubber gloves, Bunsen burners) Step-by-step instructions of the procedure Warnings to other scientists about unusual hazards Quantitative statements of reaction times and temperatures Descriptions of the physical appearances of synthesis products IR or NMR data confirming product purity Statistical packages used (including the name of the software) Reports of other software used to keep track of data (e.g., Excel)... 

Many of you have already described procedures in a lab report. Most likely, you included items such as the equation that you used to calculate percent yield or the step-by-step instructions that you followed to complete a synthesis (e.g., Heat to reflux. or Stir constantly for 10 min. ). Are such items also appropriate in a journal article To answer this question, we analyze several different excerpts. Each excerpt describes a common chemical procedure. Although by no means comprehensive, these few examples should get you started and help you understand what an expert audience expects in this move of the Methods section. 

Suggest reactions that may make life easier on the planet. Research and perform these reactions in the laboratory. Write balanced equations, and calculate percent yields in moles and in grams. Explain the purpose of these reactions in the settlers lives. 

For more practice calculating percent yield, go to Supplemental Practice Problems in Appendix A. 

Can the calculated percent yield ever be above 100%. If it can, explain how. 

Explain the reasons for lower-than-expected yields and the distinction between theoretical and actual yields, and calculate percent yield ( 3.4) (SP 3.11) (EPs 3.55-3.60, 3.63)... 

Analysis Weigh the products and calculate percent yields. Determine the melting points of the recrystallized products. Obtain IR and H NMR spectra of your starting material and product and compare them with those of authentic samples (Figs. 16.5-16.10). 

The actual yield and theoretical yield must have the same units (mole or grams). The calculated percent yield should always be a number equal to... 

When calculating percent yield, two types of reactions can be discussed. 

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