Titration_lab_ - Titration lab July 18/2019 Mohamad...

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Titration lab July 18/2019 Mohamad Alkassar Course code: dhjmvz Introduction: Titration : A titration is a technique where a solution of known concentration used to determine the unknown concentration. Brønsted-Lowry acid: A species that is able to donate proton called (proton donor). Helmenstine. 2019) Brønsted-Lowry base: A species that is accept proton called (proton acceptor). ( Helmenstine. 2018) Strong acid : is an acid dissociate completely in water into its ions. Helmenstine. 2019) Strong base: is a base dissociate completely in an aqueous solution. Helmenstine. 2018) Phenolphthalein: is an organic compound used as a laboratory reagent and pH indicator. ( Baum , 2018) Purpose: the purpose of titration lab is to determine an unknown concentration in a sample. Titration needs three basic things, first a liquid of known concentration, called the titrant. Second a liquid that is needs to be measured called titrand. Last thing is a burette for dispensing the titrant drop by drop into the titrand. The purpose of Phenolphthalein works somewhat differently as it is naturally colorless but turns pink in alkaline solutions. The compounds remains colorless throughout the range of acidic pH levels but begins to turn pink at a pH level of 8.2 and continues to a bright purple in
Titration lab July 18/2019 Mohamad Alkassar Course code: dhjmvz stronger alkalines( Baum, 2018). The endpoint of a titration is the point where the indicator just changes colour.The equivalence point is when the ratio of the reactants is in the amounts specified by the equation. (Michael, 2015) A pH indicator is a substance that it changes its colour in response to a chemical change. An acid-base indicator changes its colour depending on the pH (e.g., phenolphthalein).

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