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.
Chemistry Collective
Chem Collective: Identifying an Unknown Liquid From Its Density
In this activity, students use the virtual lab to design an experiment to determine the identity of mislabeled bottles using the densities of the solutions inside.
Chemistry Collective
Chem Collective: Gravimetric Determination of Arsenic
Set in the context of ground water contamination in Bangladesh, this stoichiometry and analytical chemistry activity examines the issues around identifying wells contaminated with arsenic. In this activity, students perform a gravimetric...
Chemistry Collective
Chem Collective: Alcohol Density Problem
Determine the concentration of an alcohol solution from its density.
Chemistry Collective
Chem Collective: Determining Stoichiometric Coefficients
In this activity, students use the virtual lab to determine how four unknown substances react with each other including their stoichiometric coefficients.
Chemistry Collective
Chem Collective: Textbook Style Limiting Reagents Problems
Textbook-style practice limiting reagent exercises with that can be used as a way to "predict and check" your answers using the virtual lab.
Chemistry Collective
Chem Collective: Determination of the P H Scale
This virtual lab activity where students perform the method of successive dilutions using HCl, NaOH, a pH meter, and universal indicator solution to help understand the logarithmic nature of the pH scale.
Chemistry Collective
Chem Collective: Standardization of Na Oh With a Khp Solution: Acid Base Titration
Use the Virtual Laboratory to standardize an unknown NaOH solution (approximately 0.2M) to four significant figures via titration with 25.00 mL of a KHP standard solution.
Chemistry Collective
Chem Collective: Determining the P Ka and Concentration Ratio
Use the virtual lab to determine the pKa of a protein then create a buffer solution with a specific concentration ratio of the protein in its protonated/ unprotonated form.
Chemistry Collective
Chem Collective: Unknown Acid and Base Problem
In this exercise, students graph the titration curve of an unknown acid and base to determine their pKa's and concentrations.
Chemistry Collective
Chem Collective: Creating a Buffer Solution
An exercise to design a buffer solution with specific properties.
Chemistry Collective
Chem Collective: Dna Dye Binding: Equilibrium and Buffer Solutions
Students examine equilibrium and buffer solutions in a biological setting.
Chemistry Collective
Chem Collective: Exploring Oxidation Reduction Reactions
Design an experiment to order Cu, Mg, Zn and Pb from strongest to weakest reducing agent.
Chemistry Collective
Chem Collective: Heats of Reaction: Hess's Law
This activity provides a demonstration of Hess's Law using three reactions: the solubility NaOH in water, the solubility NaOH in HCl, and the reaction of a solution of HCl and a solution of NaOH.
Chemistry Collective
Chem Collective: Stoichiometry and Solution Preparation Problem
In this limiting reagents problem, students mix together solutions in different ratios in an attempt to produce a final solution that contains only 1 product.