Understanding Atom Economy and Efficiency of Chemical Reactions

The video tutorial discusses the efficiency of chemical reactions, focusing on atom economy. It explains how atom economy measures the efficient use of reactants in forming products, highlighting its economic and environmental benefits. The tutorial differentiates atom economy from percentage yield and provides a formula for calculation. An example calculation is demonstrated, showing how to determine atom economy using molecular masses of reactants and products. The tutorial concludes by summarizing the importance of atom economy in sustainable chemical processes.

What is the main advantage of reaction B in terms of efficiency?

• It uses less reactants.

• It produces more waste.

• It forms additional products.

• It maximizes product yield from the same mass of reactants.

How does a high atom economy benefit the environment?

• By decreasing the product yield.

• By reducing the amount of waste that needs disposal.

• By increasing the amount of waste produced.

• By using more reactants.

Which of the following is true about atom economy?

• It is the same as percentage yield.

• It measures the efficiency of atom usage in a reaction.

• It only applies to reactions with low yield.

• It is not related to environmental impact.

What is the formula for calculating atom economy?

• Mass of reactants divided by mass of products times 100.

• Mass of desired product divided by sum of mass of reactants times 100.

• Mass of waste divided by mass of reactants times 100.

• Sum of mass of reactants divided by mass of desired product times 100.

In the example calculation, what is the molecular mass of ammonia?

• 18 grams per mole

• 16 grams per mole

• 14 grams per mole

• 17 grams per mole

What is the molecular mass of calcium hydroxide used in the example?

• 16 grams per mole

• 40 grams per mole

• 74 grams per mole

• 60 grams per mole

What is the calculated atom economy for the example reaction?

• 50.4%

• 100%

• 75.4%

• 25.4%