Chemistry Problems in Video

this website: http://www.sciencegeek.net/Chemistry/Video/index.shtml


My Flash Chemistry Videos
On this page I am beginning (January 2010) to post videos of problem solving methods used in chemistry. I create these with a QOMO tablet and Jing screen capture software. The results are in Streaming Flash (.swf) format.

I'm just getting started, but soon I will have a comprehensive set of problem-solving examples, with voice-over, to help you with quantitative problem solving in your chemistry class. If these prove to be useful, I will look at adding other chemistry subjects that lend themselves to this format.

Lewis Structures
These problems address the following CA standard: Students know how to draw Lewis dot structures. The examples are drawn from the Lewis Structures Worksheet used in class.

The HONC rule
Methane - CH4
Ammonia - NH3
Water - H2O
Carbon dioxide - CO2
Hydrogen cyanide - HCN
Ethane - C2H6
Ethyne - C2H2
Formaldehyde - CH2O
Mole Conversion Problems
These problems address the following CA standard: Students know how to determine the molar mass of a molecule from its chemical formula and a table of atomic masses and how to convert the mass of a molecular substance to moles, number of particles, or volume of gas at standard temperature and pressure. The solutions are a from a Practice Benchmark.

Problem #1 - Converting Moles to Grams
Problem #2 - Converting Grams to Moles
Problem #3 - Converting Moles to Liters
Problem #4 - Converting Liters to Moles
Problem #5 - Converting Atoms to Moles
Problem #6 - Converting Moles to Molecules
Problem #7 - Converting Molecules to Grams
Problem #8 - Converting Grams to Liters
Stoichiometry Problems
These problems address the following CA standard: Students know how to calculate the masses of reactants and products in a chemical reaction from the mass of one of the reactants or products and the relevant atomic masses.

The solutions are from a sampling of problems from our Interactive Stoichiometry Problem Set.

Problem #1 - Converting Moles to Moles
Problem #4 - Converting Liters to Moles
Problem #8 - Converting Grams to Moles
Problem #10 - Converting Liters to Moles
Problem #11 - Converting Liters to Liters
Problem #15 - Converting Liters to Grams
These problems are from our practice benchmark.

Problem #1 - Converting Moles to Moles
Problem #2 - Converting Moles to Liters
Problem #3 - Converting Grams to Moles
Problem #4 - Converting Grams to Liters
Problem #5 - Converting Moles to Grams
Problem #6 - Converting Moles to Liters
Problem #7 - Converting Grams to Liters
Problem #8 - Converting Grams to Grams
Gas Law Problems
These problems address the following CA standard: Students know how to apply the gas laws to relations between the pressure, temperature, and volume of any amount of an ideal gas or any mixture of ideal gases. These solutions are from the "warm up" problem sets used in class.

Problem #1a - Boyle's law (P and V)
Problem #2a - Boyle's law (P and V)
Problem #1b - Charles' law (V and T)
Problem #2b - Charles' law (V and T)
Problem #1c - Gay Lussac's law (P adn T)
Problem #2c - Gay Lussac's law (P adn T)
Problem #1d - Combined law (P, V and T)
Problem #2d - Combined law (P, V and T)
Calculations of Solution Concentration
These videos demonstrate solutions to solution concentration problems. The problems come from a set of practice problems used in class, which address the CA standard: Students know how to calculate the concentration of a solute in terms of grams per liter, molarity, parts per million, and percent composition.

Problem #1 - Grams per Liter
Problem #2 - Grams per Liter
Problem #3 - Molarity
Problem #4 - Molarity
Problem #5 - Percent Composition
Problem #6 - Percent Composition
Problem #7 - Parts per Million (ppm)
Problem #8 - Parts per Million (ppm)
A Comparison of the Methods of Calculation
Thermochemical Calculations
These videos demonstrate solutions to thermochemical calculation problems. The problems come from a set of interactive practice problems used in class, which address the CA standard: Students know how to solve problems involving heat flow and temperature changes, using known values of specific heat and latent heat of phase change.

Problem #1 - Specific Heat
Problem #2 - Specific Heat
Problem #4 - Specific Heat
Problem #7 - Specific Heat
Problem #9 - Latent Heat
Problem #10 - Latent Heat
Problem #14 - Latent Heat
Problem #15 - Latent Heat
http://www.sciencegeek.net/Chemistry/Video/index.shtml