Balancing Chemical Equations and Reactions

This video tutorial explains how to balance the chemical equation for the reaction of urea with water. It begins by discussing the solubility of urea in water and the necessity of an enzyme, urease, to catalyze the reaction. The tutorial then guides viewers through the process of balancing the equation, emphasizing the importance of counting atoms correctly and applying coefficients to balance both sides. Common mistakes, such as forgetting certain atoms or misapplying coefficients, are highlighted. The video concludes with the presentation of the balanced equation and a reminder of the role of the enzyme.

What is the role of an enzyme in a chemical reaction?

• It has no effect on the reaction.

• It speeds up the reaction and remains unchanged.

• It slows down the reaction and remains unchanged.

• It speeds up the reaction and is consumed in the process.

How many oxygen atoms are present on the reactant side of the equation?

• Four

• Three

• Two

• One

What is the total number of hydrogen atoms on the reactant side?

• Five

• Six

• Seven

• Four

How many nitrogen atoms are there on the product side of the equation?

• Three

• Two

• One

• Four

What coefficient should be placed in front of ammonia to balance the equation?

• Two

• One

• Three

• Four

What is a common mistake when balancing chemical equations?

• Not multiplying everything in parentheses by the coefficient.

• Ignoring the coefficients in front of compounds.

• Counting atoms on the product side only.

• Forgetting to count all atoms on the reactant side.

What is the balanced equation for urea and water with the catalyst?

• CO(NH2)2 + 2H2O → CO2 + 2NH3

• CO(NH2)2 + H2O → CO2 + NH3

• CO(NH2)2 + H2O → CO2 + 2NH3

• CO(NH2)2 + 2H2O → CO2 + NH3

What is the catalyst used in the reaction between urea and water?

• Protease

• Lipase

• Urease

• Amylase