Chemistry Collective
Chem Collective: Creating a Stock Solution
In this activity, students use the virtual lab to create dilute solutions from a concentrated stock solution of acids or bases. They must first calculate the correct volumes of concentrated acid solution and water to mix together to...
Chemistry Collective
Chem Collective: Metals Density Problem
In this activity, students use the virtual lab to identify three unknown metals by measuring their density and comparing their measurements to the densities of known metals. In this randomized version, each student designs and performs...
Chemistry Collective
Chem Collective: Determining Reactants and Products in a Solution of Dna
In this limiting reagents problem, students are given specific concentrations of DNA solutions and are asked to predict what products and reactants will remain after a specific volumes are mixed and reaction has occurred.
Chemistry Collective
Chem Collective: Determine the Concentration of Unknown Silver Nitrate Solution
In this limiting reagents problem, students are asked to determine the amount of silver nitrate dissolved in a solution by performing a reaction with solid NaCl. In this randomized activity, each student is given a different unknown...
Chemistry Collective
Chem Collective: Chemical Remediation of Arsenic
In this problem, students determine the limiting reagent in a reaction involving the remediation of arsenic from drinking water.
Chemistry Collective
Chem Collective: Determining Stoichiometric Coefficients
Students use the virtual lab to determine how four unknown substances react with each other including their stoichiometric coefficients. In this randomized activity, each student receives a different reaction and students can check their...
Chemistry Collective
Chem Collective: Coffee Problem
In this activity, students use knowledge of specific heat capacity to mix together hot coffee and cold milk to create a solution of coffee at a desired temperature. In this randomized problem, each student is given a different final...
Chemistry Collective
Chem Collective: Hot/cold Pack Problem: Part 1
Determine the heat of solution for various salts.
Chemistry Collective
Chem Collective: Hot/cold Pack Problem: Part 2
Based on information from Part 1 of the Hot/Cold Pack Problem, design a hot/cold pack.
Chemistry Collective
Chem Collective: Unknown Weak Acid Problem
Perform an experiment to determine the pKa and concentration of an unknown acid.
Chemistry Collective
Chem Collective: Unknown Weak Acid Problem Bonus
Perform an experiment to determine the concentrations of a mixture of two acids.
Chemistry Collective
Chem Collective: Solubility and the Common Ion Effect
Determine the concentration of an unknown NaCl solution using the common ion effect.
Chemistry Collective
Chem Collective: Metal Ligand Binding
Use silver chloride to determine the binding constant for a metal ligand complex.
Chemistry Collective
Chem Collective: Determine the Concentration of the Unknown Strong Acid
Perform a titration using an indicator to determine the concentration of an HCl solution.
Chemistry Collective
Chem Collective: Designing a Buffer Solution With a Specific P H
Create a buffer solution at a specific pH using a weak acid and its conjugate base.
Chemistry Collective
Chem Collective: Determining the Concentration of an Unknown Solution
Using the Virtual Laboratory design, students perform an experiment to determine the concentration of the unknown HCl solution to four significant figures.
Chemistry Collective
Chem Collective: Determining Reagent Concentrations
Using the Virtual Laboratory, design an experiment to quickly determine which of the two reagents, HCl or NaOH, is 10 times more concentrated than the other.
Chemistry Collective
Chem Collective: Determine the Amount of Vitamin C in a Peach
Perform a titration experiment to determine the concentration of absorbic acid in one medium peach.
Chemistry Collective
Chem Collective: Determine the Concentration of Acetic Acid in Vinegar
A virtual lab where students determine the concentration of acetic acid in vinegar using a 0.110 M NaOH standard solution and an acid-base indicator, phenolphthalein.
Chemistry Collective
Chem Collective: Unknown Base Problem
Perform an experiment to determine the pKa and concentration of an unknown weak base.
Chemistry Collective
Chem Collective: Engine Simulation
This simulation allows students to interact with different components of a complex real world phenomenon. The simulation shown is of a 4-stroke internal combustion engine. The thermodynamic cycle being simulated is the Otto cycle, which...
Chemistry Collective
Chem Collective: Equilibrium Simulation
This applet is similar to the stoichiometry simulation but applies to chemical reactions that do not go to completion. The calculation of the equilibrium state of such reactions is typically covered months after students learn how to...
Chemistry Collective
Chem Collective: Acclimatization on Mt. Everest
To get to the top of the mountain before winter arrives, students must derive an equation that relates the necessary amount of hemoglobin to the partial pressure of oxygen at the current and next camp.
Chemistry Collective
Chem Collective: Spectroscopic Simulator
A simulation of the vibrational/rotational spectrum of a diatomic molecule (for physical chemistry courses). This simulation of an infra-red spectrometer allows students to adjust the experimental and molecular parameters and observe the...