Balancing Chemical Equations Practice

The video tutorial explains the importance of balancing chemical equations, emphasizing the law of conservation of mass. It provides a step-by-step method for balancing equations, starting with metals, followed by non-metals, oxygen, and hydrogen. The tutorial includes various examples, from simple to advanced, to illustrate the process. The video concludes with encouragement to practice and apply the learned techniques.

Why is it important to balance a chemical equation?

• To ensure the total mass of reactants equals the total mass of products.

• To make the equation look neat.

• To increase the speed of the reaction.

• To change the properties of the reactants.

What is the first step in balancing a chemical equation according to the method discussed?

• Balance the oxygen first.

• Balance the non-metals first.

• Balance the hydrogen first.

• Balance the metals first.

In the method for balancing equations, which element should be balanced after metals?

• Noble gases

• Hydrogen

• Oxygen

• Non-metals

When balancing the equation AgNO3 + NaCl → AgCl + NaNO3, which element should be balanced first?

• Nitrogen (N)

• Sodium (Na)

• Chlorine (Cl)

• Silver (Ag)

In the equation NaOH + H2SO4 → Na2SO4 + H2O, what is the correct coefficient for NaOH to balance the equation?

• 1

• 2

• 4

• 3

What is the balanced form of the equation Fe + H2O → Fe3O4 + H2?

• 3Fe + 4H2O → Fe3O4 + 2H2

• 4Fe + 3H2O → Fe3O4 + 4H2

• Fe + H2O → Fe3O4 + H2

• 3Fe + 4H2O → Fe3O4 + 4H2

In the reaction CaCl2 + H2SO4 → CaSO4 + HCl, what is the coefficient for HCl in the balanced equation?

• 2

• 4

• 3

• 1

Which of the following is a balanced equation for the reaction CH4 + O2 → CO2 + H2O?

• CH4 + 2O2 → CO2 + 2H2O

• CH4 + 3O2 → CO2 + 2H2O

• CH4 + 2O2 → 2CO2 + 2H2O

• CH4 + O2 → CO2 + H2O

What is the balanced equation for the reaction KCN + H2SO4 → K2SO4 + HCN?

• KCN + H2SO4 → K2SO4 + HCN

• KCN + 2H2SO4 → K2SO4 + HCN

• 2KCN + H2SO4 → K2SO4 + 2HCN

• 2KCN + 2H2SO4 → K2SO4 + 2HCN

In the reaction Ag + HCl → AgCl + H2, what is the correct coefficient for HCl to balance the equation?

• 4

• 3

• 1

• 2