Balancing Chemical Reactions and Molar Calculations

The video tutorial covers stoichiometry, focusing on balancing chemical equations and solving stoichiometry problems. It includes examples of reactions involving sodium hydroxide, sulfuric acid, lithium nitrate, and acetic acid. The tutorial explains how to identify limiting reagents and calculate the mass of products formed in reactions. It also discusses the importance of significant figures in stoichiometry calculations.

What is the primary goal when balancing chemical equations?

• To ensure the total mass is equal on both sides

• To ensure the reactants and products are in a 1:1 ratio

• To have the same number of each type of atom on both sides

• To make sure the coefficients are all even numbers

In the reaction between sodium hydroxide and sulfuric acid, what is the first step in converting grams to moles?

• Add the atomic masses

• Subtract the atomic masses

• Divide by the molar mass

• Multiply by the molar mass

What is the mole ratio of sodium sulfate to sodium hydroxide in the given reaction?

• 1:1

• 2:1

• 1:2

• 3:1

In the lithium nitrate problem, what is the mole ratio of lithium nitrate to lithium sulfate?

• 2:1

• 1:2

• 3:1

• 4:2

What is the molar mass of lithium nitrate used in the calculations?

• 40 g/mol

• 142.04 g/mol

• 68.95 g/mol

• 109.9 g/mol

How do you determine the limiting reagent in a chemical reaction?

• By using the reactant with the smallest coefficient

• By calculating which reactant will run out first

• By choosing the reactant with the largest volume

• By finding the reactant with the highest molar mass

In the reaction involving C6H10 and oxygen, which is the limiting reagent?

• Carbon dioxide

• C6H10

• Oxygen

• Water

What is the theoretical yield of carbon dioxide in the reaction with C6H10 and oxygen?

• 60 grams

• 35 grams

• 43.7 grams

• 50 grams

In the acetic acid and aluminum hydroxide problem, which reactant is the limiting reagent?

• Aluminum hydroxide

• Acetic acid

• Aluminum acetate

• Water

How much aluminum acetate is produced from 125 grams of acetic acid?

• 100 grams

• 175 grams

• 141.6 grams

• 200 grams