Chapter 4: acids and redox

strong acid

One that completely dissociates and releases all of its H+ ions into aqueous solution

weak acid

One that partially dissociates and releases some of its H+ ions into aqueous solution

Alkali

A base that dissolves in water, releasing OH^_- ions into the solution

Alkali + acid →

salt + water

Acid + carbonate →

salt + water + carbon dioxide

oxidation number

a measure of the number of electrons that an atom uses to bond with an atom of another element

oxidation number of an unreacted element

0

oxidation number of oxygen in peroxides

-1

usual oxidation number of H

+1

oxidation number of H in metal hydroxides

-1

When is the oxidation number of Cl atoms not -1

in chlorates

what do roman numerals in compound names indicate

oxidation number

redox

When electrons the products of a reaction both gain and lose electrons