Question

Calculate the percent yield using data below

Question 1. Following the Task 1 experimental procedure as per the Project 10 Guide (pages 5 – 7), 1.993 g of coconut oil is run and 0.817 g of fatty acid salts (soap) is obtained. Calculate the percent yield. Show all work. actual yield % yield = theoretical yield Table P10 Average Molar Masses MMave for Various Oils and Their Saponification (Fatty Acid Salt) Products TAG Sodium Fatty Acid Salt (Soap) Potassium Fatty Acid Salt (Soap) OIL (g/mol) (g/mol) (g/mol) Palm 847.3 291.7 307.8 Coconut 869.4 299.1 315.2 Corn 875.0 301.0 317.1 Canola 876.6 301.5 317.6 332.0 Soybean 919.8 315.9

Answer 1

Reaction involved

TAG + 3MOH ------> 3(M salt of fatty acid) + Glycerol

Here, M is Sodium (Na) or Potassium​​​​​​ (K)

Moles of coconut oil taken = 1.993 g/(869.4 g/mol)

= 0.002292 moles

Theoretical moles of soap to be formed = 3*0.002292 = 0.006876 moles

Theoretical mass of sodium soap to be formed from coconut oil = 0.006876*299.1 = 2.057 g

Mass of soap formed = 0.817 g

% yield = (0.817/2.057) x 100 = 39.72 %

In case potassium soap is formed:

Theoretical mass of potassium soap from coconut oil = 0.006876*315.2 = 2.167 g

% yield = (0.817/2.167)*100 = 37.70 %