Chemical Reactions and Stoichiometry

The video tutorial explains a chemical reaction involving a mixture of silver and aluminum reacting with HCL. It details the process of calculating the moles of hydrogen gas produced and determining the percent composition of aluminum in the mixture. The tutorial emphasizes the chemical relationships and calculations necessary to solve the problem.

What is the initial mass of the mixture of silver and aluminum?

• 7.24 grams

• 5 grams

• 3.36 grams

• 10 grams

Which metal does not react with HCL in the given problem?

• Neither react

• Both react

• Silver

• Aluminum

Why does silver not react with HCL?

• Because it is a noble metal

• Because it is not in the reactivity series

• Because it forms a protective oxide layer

• Because it is too reactive

What is the volume of hydrogen gas produced in the reaction?

• 5.60 liters

• 4.48 liters

• 3.36 liters

• 2.24 liters

How many moles of hydrogen gas are produced?

• 0.10 moles

• 0.15 moles

• 0.20 moles

• 0.25 moles

What is the relationship between moles of hydrogen and moles of aluminum?

• 2:1

• 1:2

• 3:2

• 1:1

What is the percentage by mass of aluminum in the mixture?

• 40%

• 30%

• 20%

• 10%