Answer Happy

Section Exercises 1.9.1 When heated, potassium chlorate decomposes to potassium chloride and gaseous molecular oxygen: 2 KCIO3 + 2 KCl +3 02 What is the theoretical yield of oxygen when 5.00 g of potassium chlorate decomposes? Calculate the percent yield if a 5.00 g sample gives 1.84 g 0, on decomposition. Give possible reasons why the actual yield is less than the theoretical yield. Aspirin 1.9.2 Sulphuric acid is made from elemental sulphur in a three-step industrial process. How many tonnes of sulphur are required to produce 15 tonnes of H2SO4 if the three steps have yields of 94%, 92.5%, and 97%? 1.9.3 Aspirin (see structure) is produced by treating salicylic acid with acetic anhydride: 2 CH.03 + C4H&O3 + 2 C,H,O4 +H2O Salicylic acid Acetic anhyride Aspirin If the synthesis has an 87% yield, what mass of salicylic acid should be used to produce 75 g of aspirin?