Balancing Chemical Equations (medium)

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, indicating that mass is conserved during a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

Front

How do you determine the coefficients needed to balance a chemical equation?

Back

To determine coefficients, adjust the numbers in front of the compounds to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the first step in balancing a chemical equation?

Back

The first step is to write the unbalanced equation and count the number of atoms of each element on both sides.

Front

What is a common method for balancing chemical equations?

Back

A common method is the 'trial and error' method, where you adjust coefficients and check if the equation balances after each adjustment.

Front

What does it mean if a chemical equation is unbalanced?

Back

An unbalanced chemical equation indicates that the reaction does not conserve mass, as the number of atoms of at least one element is different on each side.

Front

What is the significance of balancing chemical equations in chemistry?

Back

Balancing chemical equations is crucial for accurately representing chemical reactions and predicting the amounts of reactants and products involved.

Front

What is the balanced equation for the reaction of sodium hydroxide and chlorine?

Back

2 NaOH(aq) + Cl2(aq) → 2 NaCl(aq) + NaClO(aq) + H2O(l) (coefficients: 2, 1, 1, 1, 1).

Front

What is the balanced equation for the reaction of nitrogen dioxide and water?

Back

3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) (coefficients: 3, 1, 2, 1).