10 results found for chemistry

View Grid List
Sort A-Z By date
00:30:00

Metal Flux Synthesis Media for Magnetic Compounds

by Susan Latturner
Metal Flux Synthesis Media for Magnetic Compounds
for 22 and upwards,
Lectures | 22 and upwards | 13 years ago | 2035 views
Rating:

Early rare earth metals (La, Ce, Pr, Nd) combined with late first row transition metals (Fe, Co, Ni) can produce low melting eutectic mixtures. For instance, a 75:25 mole percent mixture of La and Ni forms a eutectic that melts at 532 õC. We are inv....

More details | Watch now
00:09:00

The History of Nitrous Oxide

by Gina Nicoloso
The History of Nitrous Oxide
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 2070 views
Rating:

A look at the interesting history of nitrous oxide

More details | Watch now
00:12:00

Carbon Sequestration

by Kyle Serniak
Carbon Sequestration
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 2719 views
Rating:

Why is carbon sequestration so important?

More details | Watch now
00:26:00

Constructing Chemical Formulas

by Colin Byfleet
Constructing Chemical Formulas
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 18539 views
Rating:

An introduction to constructing and recognising chemical formulas. Using 20 well-known elements, the valency-rules which govern the atomic ratios are explained and used with several examples.

More details | Watch now
00:33:00

Chemical Equations – and how we construct them

by Colin Byfleet
Chemical Equations – and how we construct them
for 14-19 and upwards,
Teaching modules | 14-19 and upwards | 15 years ago | 2102 views
Rating:

An introduction into the writing down of fully balanced chemical equations. The process is explained starting with word equations, finding all the relevant formulas and then working with some useful rules for finding the correct coefficients in the b....

More details | Watch now
00:37:00

Oxidation Numbers and Equations

by Colin Byfleet
Oxidation Numbers and Equations
for 14-19 and upwards,
Teaching modules | 14-19 and upwards | 15 years ago | 2696 views
Rating:

The concept of oxidation and reduction is explained and generalised using oxidation numbers with ionic and covalent examples. Several equations are balanced, using the oxidation number method to fix various atomic ratios.

More details | Watch now
00:11:00

Energy Challenges: Power from Hydrogen

by Jeff Whalen
Energy Challenges: Power from Hydrogen
for 18-22 and upwards,
Postgraduate presentations | 18-22 and upwards | 15 years ago | 1981 views
Rating:

We are faced with energy challenges and the promise of power with hydrogen. The fuel cell and solid state hydrogen storage methodologies are currently limited by materials and represent the cutting edge of energy technology. Implementation to a real ....

More details | Watch now
00:07:00

Synthesis of Stable, Water Soluble Gold Colloids

by Layal L Rouhana
Synthesis of Stable, Water Soluble Gold Colloids
for 22 and upwards,
Lectures | 22 and upwards | 16 years ago | 2471 views
Rating:

Ligand exchange reactions were utilized in the production of aggregation-resistant gold nanoparticles, having an average diameter of 5 nm, comprising a gold core capped with a mixed shell of citrate and zwitterionic ligands. The prepared nanoparticl....

More details | Watch now
00:05:00

What are we made of?

by Harry Kroto
What are we made of?
for 11-14 and upwards,
Lectures | 11-14 and upwards | 16 years ago | 2018 views
Rating:

Development of the ideas which persuaded us to accept the theory of atoms and molecules as constituents of matter.

More details | Watch now
00:28:00

The Discovery of Element 101

by Colin Byfleet
The Discovery of Element 101
for All ages,
Interviews | All ages | 16 years ago | 4350 views
Rating:

A first-hand interview of the moment of this discovery from Greg Choppin who worked with Glen Seaborg.

More details | Watch now