Match the characteristic with the correct concept:
Definition ↔️ Percentage of reactant mass in product ||| Actual product amount vs. theoretical maximum
Focus ↔️ Efficiency of converting raw materials ||| Quantity of product obtained
Incomplete reactions and side reactions can decrease the actual yield of a reaction.
Catalysts can increase the yield of a reaction.
True
What is the definition of actual yield in a chemical reaction?
Measured amount of product obtained
What is the formula for calculating percentage yield?
Theoretical yieldActual yield×100
What is the formula for calculating atom economy?
Total mass of reactantsMass of desired product×100
What does atom economy measure?
Efficiency of raw materials
Match the characteristic with the correct term:
Product amount vs. theoretical maximum ↔️ Yield
Percentage of reactant mass in product ↔️ Atom Economy
The ideal value for both yield and atom economy is 100%.
True
Losses during workup and purification can decrease the final isolated yield.
What does maximizing atom economy lead to?
Less waste
What is the theoretical yield of hydrogen gas when 10g of water is electrolyzed according to the equation 2H_{2}O(l) \rightarrow 2H_{2}(g) + O_{2}(g)</latex>?
1.11 grams
To solve GCSE chemistry problems, the first step is to understand the question.
Yield in a chemical reaction refers to the amount of product obtained compared to the theoretical maximum
The theoretical yield is the maximum amount of product calculated based on the limiting
What is atom economy a measure of in a chemical reaction?
Efficiency
What is the definition of atom economy in chemical reactions?
Percentage of reactant mass in product
Atom economy is a measure of the efficiency of a reaction.
Atom economy measures the percentage of the total mass of reactants that ends up in the desired product.
True
Order the factors affecting yield from most negative to most positive effect:
1️⃣ Incomplete reaction
2️⃣ Side reactions
3️⃣ Losses during purification
4️⃣ Optimized reaction conditions
5️⃣ Catalyst use
Side reactions can lower the actual yield of a reaction.
True
If the theoretical yield is 25g and the actual yield is 20g, the percentage yield is 80%.