Introduction to Balancing and Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What does (s) represent in a chemical equation?

Back

The symbol (s) indicates that the substance is in a solid state.

Front

What does (g) represent in a chemical equation?

Back

The symbol (g) indicates that the substance is in a gaseous state.

Front

What does (l) represent in a chemical equation?

Back

The symbol (l) indicates that the substance is in a liquid state.

Front

What does (aq) represent in a chemical equation?

Back

The symbol (aq) indicates that the substance is dissolved in water, forming an aqueous solution.

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.

Front

What is the unbalanced equation for aluminum reacting with oxygen?

Back

Al(s) + O₂(g) → Al₂O₃

Front

What is the balanced equation for the reaction of sodium phosphate and calcium chloride?

Back

2Na₃PO₄ + 3CaCl₂ → Ca₃(PO₄)₂ + 6NaCl

Front

What is produced when lead reacts with oxygen?

Back

Lead(II) oxide (PbO) is produced when lead reacts with oxygen.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each substance involved in the reaction.