Segments in this Video

A Balanced Equation for Fuel (02:23)


Global energy consumption will double by 2050. Researchers are developing a device that mimics photosynthesis. It uses sunlight and water to produce hydrogen and oxygen.

Artificial Leaf Function (01:39)

A silicon wafer is coated with cobalt to promote oxygen separation and nickel for hydrogen separation. They are stored separately and used as fuel; learn about hydrogen fuel cells. Scientists hope to develop a liquid fuel source.

Gas to Liquid Fuel Equation (03:36)

Researchers hope to use Ralstonia eutropha bacteria to turn oxygen, hydrogen, and CO2 into biofuels. See how to balance a water molecule reacting to produce hydrogen and oxygen molecules.

Making Water 2:1 (03:14)

Artificial leaf technology would use two gallons of water to power a household for a day. View a demonstration combining equal parts hydrogen and oxygen to produce water with one part oxygen left over.

Calculating Molecular Mass (04:04)

Chemists use moles to measure molecules for reactions. View a demonstration of measuring ingredients and balancing the equation for sodium iodide, used in radioactive detectors.

Limiting Reagent (03:55)

A chocolate chip analogy demonstrates the limiting reactant concept. View a demonstration of reacting methanol and oxygen using a platinum wire catalyst. Oxygen is the limiting reagent.

Sustainable Chemistry (02:54)

Chemists use stoichiometry principles and renewable energy to produce green chemicals. Learn about the process of producing succinic acid, used in household products. Sulfuric acid is added to ammonium succinate to create ammonium sulfate and succinic acid.

Succinate Acid Equation (03:51)

Chemists add sulfuric acid to ammonium succinate to create ammonium sulfate and succinic acid. Calculating molecular mass from a balanced equation reveals how much sulfuric acid to add to ensure the limiting reagent, ammonium succinate, is used in the reaction.

Credits: Quantifying Chemical Reactions: Chemistry: Challenges and Solutions (00:28)

Credits: Quantifying Chemical Reactions: Chemistry: Challenges and Solutions

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Quantifying Chemical Reactions: Chemistry: Challenges and Solutions

Part of the Series : Chemistry: Challenges and Solutions
3-Year Streaming Price: $149.95



Stoichiometry helps chemists find the relative amounts of reactants and products in chemical reactions. Balancing the number of atoms on each side of the equation, calculating the amount of each reactant, and figuring out which reactant will run out first are all fundamental principles when designing any chemical reaction. These principles are applied when splitting water into hydrogen and oxygen for energy, manufacturing sodium iodide for radiation detectors, and producing common chemicals from renewable resources.

Length: 28 minutes

Item#: BVL110253

Copyright date: ©2014

Closed Captioned

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