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...
Chemistry Collective
Chem Collective: Statistical Mechanical Simulator
The Statistical Mechanics Simulator allows students to create a multi-level quantum mechanical system and explore the partition function and thermodynamic properties.
Chemistry Collective
Chem Collective: Stoichiometry Applet
One of the first numerical problems encountered in introductory chemistry is that of "limiting reagents". This applet serves as a supplement to such calculations, providing imagery that helps students see beyond the rote mathematics.
Chemistry Collective
Chem Collective: P H and Buffers Defined
This tutorial presents a review of the definitions for pH and buffer solutions
Chemistry Collective
Chem Collective: P H in the Absence of a Buffer
This tutorial describes the effects of adding strong base or strong acid to water.
Chemistry Collective
Chem Collective: How Buffers Work
This tutorial describes how buffers protect against pH changes when strong acid or base is added.
Chemistry Collective
Chem Collective: Glucose Dilution Problem
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...
Chemistry Collective
Chem Collective: Acid Dilution Problem
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...
Chemistry Collective
Chem Collective: Cola and Sucrose Concentration Problem
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. Finally, they compare the density of...
Chemistry Collective
Chem Collective: Making Stock Solutions From Solids
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...
Chemistry Collective
Chem Collective: Identifying the Unknown Metal
In this activity, students use the virtual lab to identify an unknown metal by measuring its density and comparing their measurements to the densities of known metals.