Lab: Titration Of The Unknown Acid

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The purpose of the “Titration of the Unknown Acid” lab is to determine how much of a given material known as concentration is in a substance or mixture. In this lab, the student also learns the technique of using titration. The concentration of the acid we used in class will be sampled with a standardize solution such as sodium hydroxide with an environmentally indicator to show the physical change of color that occurs to the solution by the acid. The equipment necessary for the titration experiment follows: 0.1M NaOH, Acid solution, Anthocyanin (which is found in red cabbage leaves) indicator, Burets, Ethanol 95% and DI water. First Professor Greenberg assign a labeled unknown acid solution, then we recorded the solution’s identity and bottle code. Next, we obtained an Erlenmeyer flask for the titration. Rinse it with DI water. Next we are to dispense from the buret at least mL of the designated acid into the flask. Record the initial and final volume readings on the buret in laboratory notebook data table. Next we add 20mL of deionized water and anthocyanin indicator drop…show more content…
What happens during this stage of the experiment showing visual change and acidic reaction that is becoming weaker as the molecules are deprotonated to become equal parts within the solution. So by finding the molar ratios we learned that acid to base are 1:1 when equally balance or concentrated. So therefore concentrations at stoichiometric end point can be found by plugging in the values to formulate a dilution equation as seen above. When expressing calculations I found when doing the Titration of an Unknown Acid I discovered that with .1 mL of Sodium Hydroxide and at least 10 mL Anthocyanin as/or acetic solution will produce an average molarity of 0.9 or higher according to my

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