Where are we going with this? This page will assist in developing the ability to classify solutions as acids or bases and describe their characteristic properties and/or compare and contrast the strength of acids and bases in solutions and/or, given the hydronium ion and/or the hydroxide ion concentration, calculate the pH and/or the pOH of a solution. Explain the meanings of these values.
Okay, so this one sort of defines itself! An acid-base reaction is a reaction between an acid and a base.
There has to be more…
The definition can be expanded to explain that, in an acid-base reaction, the H+ and OH- ions will "find each other" and form water. Then, the "other guys" will combine to form a salt.
To make this into a fancy definition, we might have something like…
In and acid-base reaction, the H+ ions separate from their constituent anions and the OH- ions separate from their constituent cations resulting in H2O and a salt made of the anion and cation.
So… salt? Not "salt" but "a salt." We need a definition.
In chemistry…A salt, when the result of an acid-base reaction, is a substance that consists of the ionic assembly of a positive ion (cation) from a base and the negative ion (anion) from an acid.So… not table salt. But, yes, NaCl (table salt) is a salt according to chemistry. But it's not the only salt.There are lots of different salts. Pretty much anything from the periodic table columns 1 and 2 with anything from column 17… And a whole lot more! A few include:
- sodium chromate
- potassium dichromate
- cobalt nitrate
- copper sulfate
- nickel chloride
That is NOT a complete list by far!
So… back to that acid base reaction…
Mixing an acid and a base typically results in water and a salt. For instance…
NaOH + HCl ---> NaCl + H2OKOH + HBr ---> KBr + H2O
Because the properties of both the acid and the base are eliminated, acid-base reactions are sometimes called acid-base neutralization reactions.