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Titration lab

The study of acid-base titrations involves consideration of the reactants which occur between acids and bases.For this purpose, it is convenient to distinguish between strong and weak acids and bases.The term "strong" usually refers to a substance which is completely dissociated into its component ions in a solution, while "weak" generally refers to a substance which is only partially dissociated.The principle of this experiment was to find out if the label on the bottle of vinegar was correctly displaying the percent mass of acetic acid as 5 percent through titration. Titration involves the process, operation, or method of determining the concentration of a substance in solution by adding to it a standard reagent of known concentration in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by electrical measurement, and then calculating the unknown concentration.In this experiment the technique of titration was used to determine the concentration of solutions of acids and bases.By carrying out this process, concentration of the unknown solution can be calculated.In this lab, vinegar was added to a flask, as well as the color indicator phenolphthalein, and NaOH was added slowly until the amount of moles of base and acid were equivalent.From this the concentration of vinegar was determined, as well as the percent composition of acetic acid, proving that vinegar without a doubt is 5 percent acetic acid.
The Phenolphthalein indicator is pink in basic solution, colorless in acid. We measured out three 25.0-mL samples of the unknown acid solution (recording the precise value of the volume each time), and put two drops of phenolphthalein in each. We than filled the buret to near the top with the standard NaOH solution and record the initial level. After that we slowly added NaOH to the acid solution, being careful to turn it

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