Balancing Chemical Equations

Front

What is H2O?

Back

H2O is a compound, specifically water, made up of two hydrogen atoms and one oxygen atom.

Front

Which of the following equations is balanced?

Back

2Na + 2H2O -> 2NaOH + H2 is balanced.

Front

Is the equation 2C2H2 + 5O2 -> 4CO2 + 2H2O balanced?

Back

Yes, this equation is balanced.

Front

Balance the equation: _Al + _HCl -> _H2 + _AlCl3

Back

The balanced equation is 2Al + 6HCl -> 3H2 + 2AlCl3.

Front

Is the reaction 2CH3OH + 3O2 -> 2CO2 + 4H2O balanced?

Back

Yes, this reaction is balanced.

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.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means adjusting the coefficients to ensure that the number of atoms for 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 is neither created nor destroyed in a chemical 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.

Front

What is the first step in balancing a chemical equation?

Back

The first step is to write the unbalanced equation and count the number of atoms of each element.