Balancing Equations Test

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 upheld.

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

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 appears on both sides.

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

What is the role of subscripts in a chemical formula?

Back

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

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

Front

What is the balanced equation for the reaction of sodium and water?

Back

@@2 Na + 2 H_2O ightarrow 2 NaOH + H_2$$

Front

What is the balanced equation for the reaction of tin(II) oxide and hydrogen?

Back

@@SnO_2 + 2 H_2 ightarrow Sn + 2 H_2O$$

Front

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

Back

@@2 Al + 3 FeO ightarrow Al_2O_3 + 3 Fe$$

Front

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

Back

@@V_2O_5 + 6 HCl ightarrow 2 VOCl_3 + 3 H_2O$$