Percent Yield and Limiting Reagent

In a reaction, if the theoretical yield is 120g and the actual yield is 100g, what is the percent yield?

• 83.33%

• 110%

• 90%

• 75%

Tags

NGSS.HS-PS1-7

Describe a scenario where percent yield calculations are crucial for product quality control.

• A bakery uses percent yield calculations to track the number of customers served daily.

• A car wash company uses percent yield calculations to determine the optimal soap-to-water ratio.

• A clothing store uses percent yield calculations to assess the popularity of different clothing brands.

• A pharmaceutical company uses percent yield calculations to monitor the efficiency and quality of their manufacturing process.

Tags

NGSS.HS-ETS1-3

Explain the concept of stoichiometry in the context of percent yield calculations.

• Percent yield calculations do not involve comparing actual and theoretical yields

• Stoichiometry is not relevant in percent yield calculations

• The efficiency of a reaction is determined solely by the actual yield

• Stoichiometry is essential in percent yield calculations as it allows us to compare the actual yield of a reaction to the theoretical yield, giving insight into the efficiency of the reaction.

If the theoretical yield of a reaction is 90g and the actual yield is 75g, what is the percent yield?

• 75%

• 80%

• 88%

• 83.33%

Tags

NGSS.HS-PS1-7

How can percent yield be used to assess the efficiency of a chemical reaction?

• Percent yield can be used to assess the efficiency of a chemical reaction by comparing the actual yield of the product to the theoretical yield.

• Percent yield is a way to determine the color change in a chemical reaction

• Percent yield is used to measure temperature changes in a reaction

• Percent yield is a measure of the volume of reactants used in a reaction

Tags

NGSS.HS-PS1-7

What factors can affect the percent yield of a reaction?

• Temperature, pressure, catalyst used

• Reaction vessel shape, music playing in the background, number of spectators

• Color of the reactants, time of day, phase of the moon

• Impurities, side reactions, incomplete reactions, loss of product during isolation

Tags

NGSS.HS-PS1-6

What are the implications of a low percent yield in a chemical reaction?

• Increased reaction efficiency

• Higher purity of the final product

• Implications of a low percent yield include inefficiency in the reaction process and potential loss of reactants.

• Reduced safety hazards

How does percent yield help in minimizing waste in chemical processes?

• Percent yield increases waste production

• Percent yield provides a measure of efficiency in converting reactants to products, allowing for optimization of reaction conditions to minimize waste.

• Percent yield measures the toxicity of waste produced

• Percent yield is irrelevant in chemical processes

It is the maximum amount of product you would expect from a reaction based on the amount of limiting reagent (a)  

• Theoretical yield

• Limiting Reactant

• Excess Reactant

• Product Difference

Tags

NGSS.HS-PS1-7

What is the expected value for percent yield?

• -1

• 0-100

• above 100

• Unknown