Balancing 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.

Tags

NGSS.MS-PS1-5

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be gained or lost in a chemical reaction; it can only change forms.

Tags

NGSS.MS-PS1-5

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.

Tags

NGSS.MS-PS1-2

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.

Tags

NGSS.MS-PS1-5

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Tags

NGSS.MS-PS1-5

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What is the significance of the yields sign (→) in a chemical equation?

Back

The yields sign indicates the direction of the reaction, showing that reactants are transformed into products.

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the reaction of aluminum and iron(III) oxide?

Back

2 Al + 2 FeO → Al2O3 + 2 Fe.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the balanced equation for the reaction of phosphorus pentachloride and water?

Back

PCl5 + 4 H2O → 5 HCl + H3PO4.

Tags

NGSS.MS-PS1-5

Front

What is a skeleton equation?

Back

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