Limiting Reactants & % Yield Calculations

Limiting Reactants & % Yield Calculations

Assessment

Flashcard

Chemistry

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

2.

FLASHCARD QUESTION

Front

How do you calculate percent yield?

Back

Percent yield = (Actual yield / Theoretical yield) x 100%.

3.

FLASHCARD QUESTION

Front

What is theoretical yield?

Back

Theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.

4.

FLASHCARD QUESTION

Front

What is actual yield?

Back

Actual yield is the amount of product that is actually obtained from a chemical reaction, measured in the lab.

5.

FLASHCARD QUESTION

Front

What does a percent yield of over 100% indicate?

Back

A percent yield over 100% indicates that there may have been an error in measurement or that impurities were present in the product.

6.

FLASHCARD QUESTION

Front

What is the significance of a low percent yield?

Back

A low percent yield suggests that the reaction was not efficient, possibly due to incomplete reactions, side reactions, or loss of product during recovery.

7.

FLASHCARD QUESTION

Front

In the reaction P4 + 6Cl2 → 4PCl3, if 75.0g of P4 is used, how do you find the theoretical yield of PCl3?

Back

First, determine the molar mass of P4, then use stoichiometry to calculate the moles of PCl3 produced from the moles of P4.

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