What does the color change in titration mean?
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). A drop of indicator solution is added to the titration at the start; at the endpoint has been reached the colour changes.Click to see full answer….
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). A drop of indicator solution is added to the titration at the start; at the endpoint has been reached the colour changes.Click to see full answer. Herein, what does the pink color tell you about your titration?In the titration of acetic acid with aqueous NaOH, phenolphthalein is used as the indicator. Phenolphthalein is nearly colorless in acidic solution, but turns pink at a pH of about 8. This indicates that the base has neutralized all the acid.Similarly, what does a titration tell you? 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 know solution) is added from a buret to a known quantity of the analyte (the unknown solution) until the reaction is complete. Additionally, why does the solution turn pink during titration? The indicator changes to pink because the phenolphthalein is ionized in basic solution. The base strips H+ ions from the acid, and near the end of the titration, it starts pulling H+ ions from the phenolphthalein. Phenolphthalein is a unique molecule. When the H+ is stripped off, it changes color from clear to pink.Why is HCl used in titrations?Consider this example in which a sample of hydrochloric acid (HCl) is titrated with sodium hydroxide (NaOH). During the course of the titration, the titrant (NaOH) is added slowly to the unknown solution. An acid-base indicator can be used to help identify when the change from acidic to basic occurs.
