Balancing Chemical Equations

Front

What are coefficients in a chemical equation?

Back

Coefficients are the larger numbers in a chemical equation that can be changed to balance the equation.

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.

Front

How do you balance the equation: ___ Mg + ___ O2 → ___ MgO?

Back

The balanced equation is 2 Mg + 1 O2 → 2 MgO.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule and cannot be changed when balancing equations.

Front

What is the balanced form of Sb2S3 + O2 → Sb + SO2?

Back

The balanced equation is Sb2S3 + 3 O2 → 2 Sb + 3 SO2.

Front

How do you balance the equation: ___ H2 + ___ O2 → ___ H2O?

Back

The balanced equation is 2 H2 + 1 O2 → 2 H2O.

Front

What is a skeleton equation?

Back

A skeleton equation is a chemical equation that shows the reactants and products but not their coefficients.