Mastering the Art of Balancing Chemical Equations

What fundamental principle states that atoms are neither created nor destroyed in a chemical reaction?

• Law of Multiple Proportions

• Law of Conservation of Mass

• Law of Constant Composition

• Law of Definite Proportions

Tags

NGSS.MS-PS1-5

When balancing chemical equations, what can you change to balance the equation?

• Coefficients

• Subscripts

• Atomic numbers

• Chemical symbols

In the first example, what is the initial number of hydrogen atoms on the reactant side?

• Five

• One

• Two

• Four

Tags

NGSS.MS-PS1-1

What coefficient is added in front of HCl to balance the hydrogen atoms in the first example?

• Two

• Five

• Three

• Four

Tags

NGSS.MS-PS1-5

After balancing hydrogen in the first example, how many chlorine atoms are on the product side?

• Six

• Four

• Eight

• Two

Tags

NGSS.MS-PS1-5

Why is it important to ensure coefficients are in their lowest ratio?

• To balance the charges

• To ensure the equation is correct

• To make the equation look simpler

• To follow standard conventions

Tags

NGSS.MS-PS1-5

In the second example, how many oxygen atoms are initially on the reactant side?

• Twelve

• Eleven

• Ten

• Thirteen

Tags

NGSS.MS-PS1-1

What coefficient is added in front of H3PO4 to balance phosphorus atoms in the second example?

• Three

• Four

• Five

• Two

How many hydrogen atoms are on the product side after balancing phosphorus in the second example?

• Eleven

• Twelve

• Thirteen

• Ten

Tags

NGSS.MS-PS1-5

What is the final step to ensure a chemical equation is correctly balanced?

• Check the subscripts

• Check the atomic numbers

• Check the chemical symbols

• Check the coefficients