Balancing Chemical Equations Practice

The video tutorial explains how to balance a chemical equation involving sodium bromide and calcium hydroxide. It begins by counting the atoms on each side of the equation, then proceeds to balance the bromine atoms by adjusting coefficients. The tutorial continues by balancing sodium atoms and checks the balance of oxygen and hydrogen atoms. The process concludes with a final balanced equation, ensuring all elements are accounted for. Dr. B provides a clear step-by-step guide to achieve a balanced chemical equation.

What are the initial counts of sodium, bromine, and calcium atoms on the reactant side?

• One sodium, one bromine, one calcium

• Two sodium, two bromine, two calcium

• Two sodium, one bromine, two calcium

• One sodium, two bromine, one calcium

How many oxygen atoms are there on the reactant side after considering the parentheses?

• One

• Two

• Four

• Three

What is the first step taken to balance the bromine atoms?

• Add a coefficient of two in front of sodium bromide

• Add a coefficient of two in front of calcium hydroxide

• Add a coefficient of three in front of sodium bromide

• Add a coefficient of one in front of sodium hydroxide

What happens to the sodium atoms when a coefficient of two is added in front of sodium bromide?

• They become balanced

• They remain unchanged

• They double in number

• They become unbalanced

What adjustment is made to balance the sodium atoms?

• Add a coefficient of one in front of calcium hydroxide

• Add a coefficient of four in front of sodium hydroxide

• Add a coefficient of three in front of sodium bromide

• Add a coefficient of two in front of sodium hydroxide

How are the oxygen atoms balanced in the final steps?

• By adding a coefficient of three in front of calcium hydroxide

• By adding a coefficient of one in front of calcium hydroxide

• By adding a coefficient of two in front of sodium hydroxide

• By adding a coefficient of two in front of sodium bromide

What is the final step to ensure the hydrogen atoms are balanced?

• Add a coefficient of three in front of sodium bromide

• Add a coefficient of two in front of sodium hydroxide

• Add a coefficient of four in front of sodium hydroxide

• Add a coefficient of one in front of calcium hydroxide

What is the final balanced equation for the reaction?

• 2 NaBr + Ca(OH)2 → NaOH + CaBr2

• NaBr + Ca(OH)2 → NaOH + CaBr2

• 2 NaBr + Ca(OH)2 → 2 NaOH + CaBr2

• NaBr + 2 Ca(OH)2 → 2 NaOH + CaBr2