Balancing Chemical Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products until the number of atoms of each element is equal on both sides.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What type of reaction is CH₄ + O₂ → CO₂ + H₂O?

Back

This is a combustion reaction, where a hydrocarbon reacts with oxygen to produce carbon dioxide and water.

Front

What are the products of the reaction between aluminum and hydrochloric acid?

Back

The products are hydrogen gas (H₂) and aluminum chloride (AlCl₃).

Front

What is the balanced equation for the reaction of calcium with water?

Back

The balanced equation is Ca + 2H₂O → Ca(OH)₂ + H₂.

Front

What does it mean if an equation is already balanced?

Back

If an equation is already balanced, it means that the number of atoms of each element is the same on both sides of the equation without needing any adjustments.

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another in a compound.

Front

What is a double replacement reaction?

Back

A double replacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds.