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About This Simulation
Learn about Avogadro’s number and the relationship between moles, mass and molecular weight as you use the technique of gravimetric analysis to identify an unknown compound.
Learning Objectives
- Explain the relationship between mass, molecular weight, and numbers of atoms or molecules and perform calculations deriving these quantities from one another
- Perform mass-to-mass stoichiometric calculations via conversions to mole
- Identify the limiting and excess reagents in a chemical reaction
- Calculate the theoretical, actual and percent reaction yield
- Define Avogadro’s number and describe the mole quantification of matter
About This Simulation
Lab Techniques
- Gravimetric analysis
Related Standards
- HS-PS1-1, HS-PS1-2
- 1.3 Elemental Composition of Pure Substances
- Chemistry 4.5 Stoichiometry
- 4.3 Representation of Reactions
- Chemistry 1.1 Moles and Molar Mass
- 4.2 Net Ionic Equations
- 4.1 Introduction for Reactions
- 1.3 Reacting masses and volumes
- 1.2 The mole concept
- 1.1 Introduction to the particulate nature of matter and chemical change
Learn More About This Simulation
Did you know that there are more water molecules in a glass of water than there are sand grains in the Sahara desert? In this simulation, you will learn about the relationship between mass, molecular weight and the number of atoms or molecules, and you will understand the magnitude and importance of Avogadro’s number.
Identify an unknown compound
In order to identify a compound where the label has been partly destroyed, you must apply the technique of gravimetric analysis. To do so, you must first learn to understand the relationship between mass, moles and molecular weights and how to perform stoichiometric calculations from mass to mass via mole conversions.
Stoichiometric calculations with moles
You will perform a realistic gravimetric analysis with detailed instructions on what to do and why to do it in every step of the experiment. From balancing the equation to recognizing the stoichiometry of the reactants and finding out which equation to employ in the calculations, the theory behind the experiment is explained step-by-step in the order of the experiment.
What compound is it?
At the end of the simulation, you will have finalized all of the stoichiometric calculations, and the answer to the question should be clear… Can you see what compound it is?
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.png?fm=jpg&w=450&h=400 "Reactions and Structure: Alkenes")
Reactions and Structure: Alkenes
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For Science Programs Providing a Learning Advantage
North Dakota State College of Science
“They did the simulation at home, then completed the in-person lab within 30 minutes, no questions asked, and passed the quiz with flying colors.”
Lecturer in Human Physiology
University of Westminster
"I saw some of the students who clearly didn’t necessarily like sitting there reading a book discover they could turn on Labster and keep up with the rest of the class because it spoke to them.
Modesto City Schools
"Having something that's engaging for the students gives teachers that opportunity to breathe and get excited again. Because they're seeing the kids light up, they're seeing the kids engage with content."
Wenatchee Valley College
"The question always is, ‘Can we demonstrate that the students are meeting course outcomes?’ Check! We can do that.”
San José State University
"We surveyed over 400 students. More than 90% thought Labster was easy to navigate, and that it was fun, but more importantly, most of them felt confident that they could execute the labs in person. And that confidence is a big deal."
FAQs
Find answers to frequently asked questions.
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Labster can be integrated within a school's LMS (Learning Management System), and students can access it like any other assignment in their LMS. If your Institution does not choose an LMS integration, students will log in to Labster's Course Manager once they have an account created. Your institution will decide the access method during the sales process.
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Labster simulations are created by real scientists and designed with unparalleled interactivity. Unlike point and click competitors, Labster simulations immerse students and encourage mastery through active learning.
Labster supports a wide range of courses at the high school and university level across fields in biology, chemistry and physics. Some simulations mimic lab procedures with high fidelity to train foundational skills, while others are meant to bring theory to life through interactive scenarios.