Determination of the concentration of a base by titration with acids or determination of the concentration of an acid by titration with bases. (http://en.wikipedia.org/wiki/Acid-base_titration)
HCl + KOH → H2O + KCl
litmus paper
an acid-base titration reaction involves a neutralization reaction.
Examples of acidic compounds:HCl, H2SO4 Examples of alkaline compounds:NaOH,NH3
Indicator. See related links below.