Original Articles: 2012 Vol: 4 Issue: 6
Rhatany indicators as a subsistent to synthetic indicators
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution . Typically, the titrant (the known solution) is added from a buret to a known quantity of the analyte (the unknown solution) until the reaction is complete. Knowing the volume of titrant added allows the determination of the concentration of the unknown. Often, an indicator is slowly added to the solution being titrated to usually signal the end of the reaction until the indicator changes color. The technique of titration is used to find out accurately how much of a chemical substance is dissolved in a given volume of a solution, that is, the concentration of the solution. An Indicator does not change color from pure acid to pure alkaline at specific hydrogen ion concentration, but rather, color change occurs over a range of hydrogen ion concentrations. This range is termed the color change interval called the pH range. Weak acids are titrated in the presence of indicators which change under slightly alkaline conditions. Weak bases should be titrated in the presence of indicators which change under slightly acidic conditions.