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The reaction in which hydrogen adds across a double or triple bond.

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Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Molality

Concentration expressed as number of moles of solute per kilogram of solvent.

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.

Electromotive Series

The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.

Molecular Orbital Theory

A theory of chemical bonding based upon the postulated existence of molecular orbitals.

Carbanion

An organic ion carrying a negative charge on a carbon atom.

Hydrogen-Oxygen Fuel Cell

Fuel cell in which hydrogen is the fuel (reducing agent) and oxygen is the oxidizing agent.

 

Hydrogenation

The reaction in which hydrogen adds across a double or triple bond.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.