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 is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the law of conservation of mass is followed, meaning that matter is neither created nor destroyed in a chemical reaction.

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 is a coefficient in a chemical equation?

Back

A coefficient is a large number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

How do you balance the equation Al + HCl -> H2 + AlCl3?

Back

Place coefficients 2, 6, 3, 2 in front of Al, HCl, H2, and AlCl3 respectively to balance the equation.

Front

What does the arrow in a chemical equation represent?

Back

The arrow represents the direction of the reaction, indicating that reactants are transformed into products.

Front

What is the significance of the subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule; for example, H2 means there are 2 hydrogen atoms.

Front

What is the first step in balancing a chemical equation?

Back

The first step is to write down the number of atoms of each element present in the reactants and products.

Front

What is the balanced form of the equation 4Ag + O2 -> ?Ag2O?

Back

The balanced form is 4Ag + O2 -> 2Ag2O.