Chemistry 121 Chapter 4 Notes - Stoichiometry of Chemical Reactions

These flashcards cover essential concepts related to stoichiometry and chemical reactions from the lecture notes for Chemistry 121.

What do chemical equations represent?

Chemical equations represent chemical reactions, showing reactants, products, and their ratios.

What is the Law of Conservation of Matter?

Matter is not created or destroyed during a chemical reaction, meaning atoms must be conserved.

How should coefficients be changed when balancing equations?

Change the coefficients, not the subscripts, as changing subscripts alters the substance.

What is a reversible reaction?

A reversible reaction can proceed in both forward and reverse directions, represented by a double arrow.

What are electrolytes?

Electrolytes are substances that conduct electricity when dissolved in water.

What differentiates strong electrolytes from weak electrolytes?

Strong electrolytes completely dissociate into ions, while weak electrolytes only partially dissociate.

What defines a strong acid?

A strong acid completely ionizes in aqueous solution, increasing H+ concentration.

What is a limiting reactant?

The limiting reactant is the reactant that is completely consumed first in a reaction, determining the amount of product formed.

What is percent yield?

Percent yield is calculated as (Actual yield / Theoretical yield) x 100%.

What is a titration?

A titration is a process where a solution of known concentration (titrant) is added to a solution of unknown concentration to determine its concentration.