Mastering Balancing Chemical Equations

This video is the second part of a series on balancing chemical equations. It focuses on techniques to make unbalanced equations balanced by adjusting the reactant and product sides. The video provides step-by-step examples, starting with simple equations and progressing to more complex ones. It emphasizes the importance of showing work and using placeholders to ensure accuracy. The tutorial concludes with tips for handling complex equations and encourages viewers to practice these methods.

Why is it important to balance chemical equations?

• To increase the amount of products

• To change the properties of the reactants

• To ensure the same number of atoms of each element on both sides

• To make the equation look neat

Tags

NGSS.HS-PS1-7

What is the first step in balancing the equation Mg + N2 → Mg3N2?

• Add coefficients randomly

• Draw a line below the arrow to separate reactants and products

• Change the subscripts of the compounds

• Remove elements from the equation

Tags

NGSS.HS-PS1-7

How many magnesium atoms are needed to balance the equation Mg + N2 → Mg3N2?

• 1

• 4

• 3

• 2

Tags

NGSS.HS-PS1-7

In the equation 2 KNO3 → KNO2 + O2, why is it tricky to balance?

• Nitrogen is listed twice on the reactant side

• Potassium is listed twice on the product side

• Oxygen is listed twice on the reactant side

• Oxygen is listed twice on the product side

Tags

NGSS.HS-PS1-7

What is the balanced form of the equation 2 KNO3 → KNO2 + O2?

• 2 KNO3 → KNO2 + 2 O2

• KNO3 → KNO2 + O2

• KNO3 → 2 KNO2 + O2

• 2 KNO3 → 2 KNO2 + O2

Tags

NGSS.HS-PS1-7

In the equation Fe + H2SO4 → Fe2(SO4)3 + H2, what is the first element to balance?

• Iron

• Oxygen

• Sulfur

• Hydrogen

How many hydrogen atoms are needed on the product side to balance the equation Fe + H2SO4 → Fe2(SO4)3 + H2?

• 2

• 8

• 4

• 6

What is the balanced form of the equation Fe + H2SO4 → Fe2(SO4)3 + H2?

• 2 Fe + 3 H2SO4 → Fe2(SO4)3 + 3 H2

• Fe + H2SO4 → Fe2(SO4)3 + H2

• 2 Fe + H2SO4 → Fe2(SO4)3 + 3 H2

• Fe + 3 H2SO4 → Fe2(SO4)3 + 3 H2

In the equation KOH + H3PO4 → K3PO4 + H2O, which element should be balanced first?

• Potassium

• Hydrogen

• Oxygen

• Phosphorus

Tags

NGSS.HS-PS1-7

What is the balanced form of the equation KOH + H3PO4 → K3PO4 + H2O?

• KOH + H3PO4 → K3PO4 + H2O

• 3 KOH + H3PO4 → K3PO4 + 3 H2O

• 3 KOH + H3PO4 → K3PO4 + H2O

• 2 KOH + H3PO4 → K3PO4 + 2 H2O