Balancing Chemical Equations Quiz

What is the primary reason for balancing chemical equations?

• To ensure the reaction is fast

• To obey the conservation of mass

• To make the reaction colorful

• To increase the temperature

In the combustion of methane, what are the products formed?

• Hydrogen and oxygen

• Sodium chloride and water

• Methane and oxygen

• Carbon dioxide and water

What is the coefficient of water in the balanced equation for the electrolysis of water?

• 2

• 1

• 4

• 3

When balancing the electrolysis of water equation, what is the final coefficient for hydrogen gas?

• 4

• 1

• 2

• 3

In the calcium chloride and sodium phosphate reaction, what strategy is suggested for balancing?

• Guessing the coefficients

• Balancing only one element

• Using a table to track atoms

• Ignoring the polyatomic ions

How many calcium atoms are on the right side of the equation in the calcium chloride and sodium phosphate example?

• 4

• 3

• 2

• 1

In the final example, what is the initial number of carbon atoms on the left side?

• 8

• 2

• 1

• 4

What is the total number of hydrogen atoms on the right side in the carbon monoxide and hydrogen gas example?

• 18

• 20

• 34

• 16

What is the final coefficient for hydrogen gas in the carbon monoxide and hydrogen gas reaction?

• 34

• 8

• 16

• 17

What is the suggested approach for balancing elements that appear by themselves in an equation?

• Use any coefficient

• Ignore them

• Balance them first

• Balance them last