Balancing Chemical Equations Concepts

The video tutorial explains how to balance a chemical equation by starting with elements that appear only once on each side. It demonstrates balancing cobalt and sulfur, followed by polyatomic ions like nitrate and ammonium. Finally, it calculates the sum of the coefficients to find the correct answer.

What is the main objective of the problem discussed in the video?

• To determine the type of chemical reaction

• To identify the elements in a chemical reaction

• To find the sum of coefficients in a balanced chemical equation

• To calculate the molecular weight of compounds

Which element should you start with when balancing a chemical equation?

• Elements that appear multiple times on each side

• The heaviest element

• Elements that appear only once on each side

• The lightest element

What coefficient is placed before cobalt nitrate to balance cobalt?

• 4

• 3

• 2

• 1

How many sulfur atoms are there on the right-hand side of the equation?

• 3

• 2

• 4

• 1

What is the coefficient for ammonium sulfide to balance sulfur?

• 1

• 3

• 4

• 2

How many nitrate ions are needed on the right-hand side to balance the equation?

• 8

• 6

• 4

• 2

What is the total number of ammonium ions on the left-hand side after balancing?

• 2

• 4

• 6

• 8

Which of the following is a polyatomic ion mentioned in the video?

• Phosphate

• Nitrate

• Sulfate

• Carbonate

What is the sum of the coefficients a, b, c, and d in the balanced equation?

• 14

• 12

• 10

• 16

What is the final answer to the problem discussed in the video?

• 10

• 11

• 13

• 12