Stoichiometry Problem Solving Techniques

The video tutorial explains how dimensional analysis is used in stoichiometry, focusing on the Kudos method for solving word problems. It covers mole-to-mole and mass-to-mass stoichiometry problems, detailing the use of mole ratios, molar mass calculations, and solution stoichiometry. The tutorial provides examples and emphasizes the importance of significant figures in calculations.

What is the first step in the KUDOS method for solving stoichiometry problems?

• Identify the unknown

• Identify the known

• Perform dimensional analysis

• Substantiate your answer

In a mole-to-mole stoichiometry problem, what is typically given?

• Mass of a compound

• Volume of a gas

• Moles of a compound

• Concentration of a solution

What is the mole ratio of hydrogen to oxygen in the example provided?

• 2:1

• 3:1

• 1:2

• 1:1

How do you determine the molar mass of a compound?

• By adding the atomic numbers of the elements

• By multiplying the number of atoms by their atomic masses and adding them

• By dividing the atomic mass by the number of atoms

• By subtracting the atomic mass of the smallest element

What is the molar mass of calcium bromide as calculated in the example?

• 99.90 g/mol

• 199.90 g/mol

• 9.09 g/mol

• 9.90 g/mol

In a mass-to-mass stoichiometry problem, what is the first unit that needs to be canceled?

• Moles of the known

• Liters of the solution

• Grams of the known

• Moles of the unknown

What is the final unit when solving a mass-to-mass stoichiometry problem involving barium hydroxide?

• Moles of sodium hydroxide

• Liters of sodium hydroxide

• Grams of sodium hydroxide

• Grams of barium hydroxide

What is the common unit for concentration in solution stoichiometry problems?

• Molality

• Density

• Normality

• Molarity

How is molarity used in solution stoichiometry problems?

• To convert between moles and atoms

• To convert between moles and liters

• To convert between grams and moles

• To convert between liters and grams

What is the final unit when converting 15.7 g of barium hydroxide to liters of NaOH?

• Grams of NaOH

• Moles of NaOH

• Moles of barium hydroxide

• Liters of NaOH