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  • The ChemCollective
Acid Dilution Problem
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In this activity, students use the virtual lab to create 500mL of 3M HCl solution from a concentrated stock solution of 11.6M HCl. They must first calculate the correct volumes of 11.6M HCl solution and water to mix together to create the final solution. Next, they prepare the solution using the appropriate glassware, and then can check their answer using the concentration viewer in the solution info panel.

Subject:
Chemistry
Material Type:
Activity/Lab
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Date Added:
02/05/2021
Cola and Sucrose Concentration Problem
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CC BY-NC-ND
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In this activity, students use the virtual lab to prepare a sucrose solution for a soda recipe. They next calculate the concentration of their solution in terms of molarity, percent mass and density.

Subject:
Chemistry
Material Type:
Lesson
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Date Added:
02/05/2021
Glucose Dilution Problem
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CC BY-NC-ND
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In this activity, students use the virtual lab to create a 0.025M glucose solution from a standard 1M glucose solution. First, they calculate the correct volumes of 1M glucose solution and water to mix together to create the final 0.025M solution. Next, they prepare the solution using the appropriate glassware. Students can check to see if their procedure was correct using the concentration viewer in the solution info panel.

Subject:
Chemistry
Material Type:
Activity/Lab
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Date Added:
02/05/2021
Making Stock Solutions from Solids
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CC BY-NC-ND
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In this activity, students use the virtual lab to create stock solutions starting from solid salts. Students must first calculate the correct amount of solid to make the solution. Next, they prepare the solution using the appropriate glassware. Students can check to see if their procedure was correct using the concentration viewer in the solution info panel.

Subject:
Chemistry
Material Type:
Activity/Lab
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Date Added:
02/05/2021
Meals-Ready-To-Eat Scenario
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You and a friend are hiking the Appalachian Trail when a storm comes through. You stop to eat, but find that all available firewood is too wet to start a fire. From your Chem 106 class, you remember that heat is given off by some chemical reactions; if you could mix two solutions together to produce an exothermic reaction, you might be able to cook the food you brought along for the hike. Luckily, being the dedicated chemist that you are, you never go anywhere without taking along a couple chemical solutions called X and Y just for times like this. The Virtual Lab contains solutions of compounds X and Y of various concentrations.

Subject:
Chemistry
Material Type:
Activity/Lab
Homework/Assignment
Lesson Plan
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Author:
Dr. David Yaron
Date Added:
02/16/2011
Measuring the heat capacity of an engine coolant.
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As an analytical chemist at a company developing new engine coolants your task is to determine the heat capacity of a newly developed product and then to determine if its heat capacity is greater of less than that of ethylene glycol.

Subject:
Chemistry
Material Type:
Activity/Lab
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Date Added:
02/05/2021
The Mole
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You probably remember the mole from high school chemistry, but do you remember why it is useful to chemists? The goal of the following video is to give the "big picture" of the mole and its applications; information on how to use the mole in calculations can be found in another tutorial. Throughout this course, we will use the term "molecular weight" to refer to the mass of a mole of a substance (for instance, the molecular weight of oxygen (O2) is 32 g/mol). Recent textbooks refer to this as "molar mass" to emphasize (i) that this term refers to the mass, not the weight, of substance, and (ii) that the quantity refers to a mole of a substance, not a single molecule. "Molecular weight" may be less precise, but it remains the term that most practicing chemists use in the laboratory. For this reason, we continue to use "molecular weight" in this course.

Subject:
Chemistry
Material Type:
Homework/Assignment
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Author:
Dr. David Yaron
Date Added:
02/16/2011
Ozone Scenario
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During the first kinetics lecture, we traced the efforts of atmospheric chemists to explain the depletion of ozone in the upper atmosphere. (The powerpoint slides have been posted on Blackboard for your review.) U2 spy planes gathered much of the initial data that linked ClO in the stratosphere to the ozone depletion. The data collected during these flights showed the concentrations of various chemical species in the stratosphere, but did not measure how fast the processes were occurring. To determine the kinetics (rates) of ozone depletion reactions, chemists perform controlled laboratory studies. In this homework, we will interpret data obtained from such laboratory experiments to study the ozone depletion reaction.

Material Type:
Homework/Assignment
Lecture Notes
Provider:
Carnegie Mellon University
Provider Set:
The ChemCollective
Author:
Dr. David Yaron
Date Added:
02/16/2011