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In chemistry, titration is an analytical technique used to determine pHc, concentration of a known substance in a sample and other properties by neutralization. To make a titration, the titrant (the know solution) is added from a buret to a known quantity of the analyte (the unknown solution) until the reaction is complete.
You add an indicator such as phenolphthalein in the case of pH to the analyte and then add the neutralization agent of known strength. If you know the sample size and the amount of reagent required to reach neutralization, then you can calculate the original quality or strength of the original sample.
E.g. it can be used to discover the amount of salt in a substance.

How is this technique used in industry, in chemical labs, analytical chemistry, medical industry, drug testing, find at least 3 examples.

This technique is used in different industries, you can use the technique in:
The pharmaceutical industry – you use titration to check the concentrations of the drugs;
The food industry – it can be used to discover the amount of salt or sugar in a product or the concentration of vitamin C or E, which has an effect on product colour;
The cosmetic industry – It can check the amount of the products used in makeup and perfumes, regulating them to not cause any harm, e.g. Regulating the amount of metal in makeup in a way that doesn’t cause metal poisoning.;
The chemical industry – you use titration to determine the concentration of fuel (petrol) and to check the strength of an acid, it can also be used to analyse wastewater.
The medical industry – it can be used to determine unknown concentrations of chemical in blood or/and urine.

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