Balancing Chemical Equations Concepts

The video tutorial explains how to balance a double displacement reaction involving iron(III) chloride and sodium phosphate. It begins by counting the atoms on each side of the equation and introduces a trick for handling polyatomic ions like phosphate. The tutorial then demonstrates how to balance the equation by adjusting coefficients, ensuring equal numbers of sodium and chlorine atoms on both sides. The process is completed with a balanced equation for FeCl3 and Na3PO4, emphasizing that counting phosphorus and oxygen atoms individually yields the same result.

What is the first step in balancing a double displacement reaction?

• Ignore the polyatomic ions.

• Add coefficients randomly.

• Count the atoms on each side of the equation.

• Change the chemical formulas.

How can polyatomic ions be treated to simplify balancing?

• By changing their subscripts.

• As a single unit if they appear on both sides.

• As separate atoms.

• By ignoring them.

What is the purpose of adjusting coefficients in a chemical equation?

• To change the chemical properties.

• To balance the number of atoms on each side.

• To increase the reaction speed.

• To create new compounds.

Which coefficient is used to balance sodium and chlorine in the given reaction?

• 3

• 2

• 1

• 4

What is the result of balancing the equation for FeCl3 and Na3PO4?

• The equation remains unbalanced.

• The equation is balanced with equal atoms on both sides.

• The equation has more atoms on the product side.

• The equation has more atoms on the reactant side.

Why might you count phosphorus and oxygen atoms individually?

• To decrease the reaction rate.

• To increase the reaction rate.

• To change the chemical formula.

• To verify the balance of the equation.

What is the balanced equation for the reaction between FeCl3 and Na3PO4?

• 3FeCl3 + Na3PO4 → FePO4 + NaCl

• FeCl3 + Na3PO4 → FePO4 + NaCl

• FeCl3 + 3Na3PO4 → 3FePO4 + NaCl

• FeCl3 + Na3PO4 → FePO4 + 3NaCl