Balancing Chemical Reactions and Atoms

The video tutorial explains how to balance a chemical equation involving zinc hydroxide and hydrochloric acid. It begins by introducing the equation and counting the atoms on each side. The tutorial then demonstrates how to balance the equation by adjusting coefficients, ensuring the number of atoms for each element is equal on both sides. Common mistakes, such as miscounting atoms in parentheses, are highlighted. The video concludes with the balanced equation and a reminder to count all atoms accurately.

What are the reactants in the given chemical equation?

• Zinc hydroxide and hydrochloric acid

• Zinc chloride and water

• Zinc and chlorine

• Hydrogen and oxygen

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

• One

• Three

• Two

• Four

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

• Four

• Five

• Three

• Two

Which element should be balanced first according to the tutorial?

• Zinc

• Chlorine

• Oxygen

• Hydrogen

What coefficient is placed in front of HCl to balance the chlorine atoms?

• One

• Two

• Four

• Three

How many hydrogen atoms are there on the product side after balancing?

• Five

• Three

• Four

• Two

What common mistake do people make when counting atoms in parentheses?

• Forgetting to multiply by the subscript outside the parentheses

• Counting extra atoms

• Ignoring the coefficients

• Misidentifying the elements

What is the final balanced equation for the reaction?

• Zn(OH)2 + HCl → ZnCl2 + 2H2O

• Zn(OH)2 + 2HCl → ZnCl2 + H2O

• Zn(OH)2 + HCl → ZnCl2 + H2O

• Zn(OH)2 + 2HCl → ZnCl2 + 2H2O