C3. Stoichiometry Flashcards
(20 cards)
What is the formula for an ionic compound?
The formula is determined by the charges of the ions involved.
What does the “ionic bond” mean?
An ionic bond forms when one atom donates an electron to another
What is the first step in balancing a chemical equation?
Make sure the number of atoms of each element is the same on both sides of the equation.
How do you balance a simple equation?
Adjust the coefficients in front of the chemical formulas to balance the number of atoms of each element.
What does a coefficient in a balanced equation represent?
A coefficient represents the number of molecules or moles of that substance.
What is the general rule for writing the formula of an ionic compound?
Write the symbols of the ions
How do you determine the formula of an ionic compound?
Balance the positive and negative charges to ensure the compound is neutral.
What is the process of writing a chemical equation?
Identify the reactants and products
What is a balanced chemical equation?
A balanced chemical equation has the same number of each type of atom on both sides.
What is the formula for water?
The formula for water is H₂O.
What is the formula for sodium chloride?
The formula for sodium chloride is NaCl.
How do you balance the equation for the reaction of hydrogen and oxygen?
Make sure there are the same number of hydrogen and oxygen atoms on both sides (2H₂ + O₂ → 2H₂O).
What does it mean to balance an equation?
It means ensuring the number of atoms of each element is the same on both sides of the reaction.
How do you balance the equation for the combustion of methane?
Balance carbon
What is the formula for carbon dioxide?
The formula for carbon dioxide is CO₂.
What is the rule for writing formulas of simple ionic compounds?
The number of positive ions (cations) and negative ions (anions) must balance out to make the compound neutral.
How do you know the formula of an ionic compound?
The formula depends on the ratio of the ions that make up the compound
What is the formula for calcium chloride?
The formula for calcium chloride is CaCl₂.
How do you write a simple chemical equation?
Write the reactants and products with correct chemical symbols
What does it mean if a chemical equation is not balanced?
It means the law of conservation of mass is not followed
