Chemistry Stoichiometry Flashcards

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Questions and Answers

What is stoichiometry?

Part of chemistry that studies amounts of substances involved in reactions (correct)

Part of physics that studies energy changes

Part of biology that studies chemical reactions

Part of mathematics that studies amounts

Define mole ratio.

Identify how many moles of product are formed from a certain amount of reactant.

What is molar mass?

The mass of a given substance divided by its amount of substance.

What is a limiting reactant?

How much of the product is produced. Signup and view all the answers

What is an excess reactant?

What is left over. Signup and view all the answers

What is theoretical yield?

Quantity of a product obtained from the complete conversion of the limiting reactant in a chemical reaction. Signup and view all the answers

Define actual yield.

The amount actually produced of a product. Signup and view all the answers

What is percent yield?

Calculated to be the experimental yield divided by the theoretical yield multiplied by 100%. Signup and view all the answers

What is a reactant?

A substance that takes part in and undergoes change during a reaction. Signup and view all the answers

What is a product in chemical reactions?

Substance that is formed as the result of a chemical reaction. Signup and view all the answers

Explain the concept of mole ratio in reaction stoichiometry problems.

The concept of mole ratio in reaction stoichiometry problems is used as conversion factors from moles of a reactant to another. Signup and view all the answers

Differentiate between theoretical yield and actual yield in stoichiometric calculations.

Theoretical yield is the predicted amount, and actual yield is the actual amount produced. Signup and view all the answers

What is the role of molar mass in stoichiometry?

The molar mass is used to convert between grams and moles. Signup and view all the answers

What is the percentage yield of a reaction?

The amount over the theoretical amount multiplied by 100. Signup and view all the answers

Why are actual yields usually less than calculated theoretical yields?

The actual yield is determined by the limiting reactant. Signup and view all the answers

What is the first step in a stoichiometry problem?

Write a balanced equation for the reaction. Signup and view all the answers

How can you determine the limiting reactant?

Find the limiting reagent by looking at the number of moles of each reactant. Signup and view all the answers

Study Notes

Stoichiometry Basics

Stoichiometry studies the quantities of substances involved in chemical reactions.
Mole ratio indicates how many moles of product can be produced from a specific amount of reactant.

Key Terms

Molar mass is the mass of a substance divided by its amount (typically in moles).
Limiting reactant determines the maximum amount of product that can be produced in a reaction.
Excess reactant refers to the substances that remain after a reaction is complete.

Yields in Reactions

Theoretical yield is the maximum quantity of product that could be generated from the limiting reactant.
Actual yield is the amount of product actually obtained from the reaction.
Percent yield is calculated as (actual yield / theoretical yield) × 100%.

Reaction Components

Reactants are substances that undergo chemical changes during a reaction.
Products are the new substances formed as a result of the reaction.

Stoichiometric Calculations

Mole ratios serve as conversion factors for transitioning between moles of reactants and products, essential for balanced reactions.
Theoretical yield is the expected outcome based on calculations, while actual yield reflects the practical result, often influenced by limiting reactants.

Problem-Solving Steps

In stoichiometry problems, the first step is to write a balanced equation for the chemical reaction.
To identify the limiting reactant, compare the number of moles of each reactant involved in the reaction.

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Description

Explore key concepts in Stoichiometry with these flashcards. Learn about essential terms such as mole ratio, molar mass, and limiting reactants. This quiz is designed to help solidify your understanding of how substances interact in chemical reactions.