Balancing Chemical Equations 2024

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products involved.

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

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; it is conserved.

Front

How do you identify the coefficients in a chemical equation?

Back

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

Front

What is the balanced equation for the reaction of iron and oxygen to form iron(III) oxide?

Back

4Fe + 3O₂ → 2Fe₂O₃.

Front

How many magnesium atoms are needed to balance the equation: Mg + O₂ → MgO?

Back

2 magnesium atoms are needed: 2Mg + O₂ → 2MgO.

Front

What is the balanced equation for the reaction of aluminum and hydrochloric acid?

Back

2Al + 6HCl → 3H₂ + 2AlCl₃.

Front

How do you determine the number of atoms in a compound?

Back

Count the subscripts in the chemical formula; for example, in 6NaCl, there are 6 sodium (Na) atoms.