Initial model: What happens when an acid and base are mixed? Based on your initi
ID: 496588 • Letter: I
Question
Initial model: What happens when an acid and base are mixed? Based on your initial understanding, describe and/or represent in some way the important characteristics of an acid-base titration where a base (B) is added to an acid (HA). In formulating your model, include macroscopic- and molecular-level descriptions (in words and/or pictures) of the expected contents of your flask at the following stages of the experiment: a) just before you begin the titration; b) in the middle of the titration (halfway to the equivalence point); and c) at the end point of the titration. In your model, indicate the approximate pHs of the relevant solutions and provide balanced chemical equations to indicate the reaction (s) that will occur. In representing your molecular models, you may ignore the presence of the indicator in the flask.Explanation / Answer
a.before acid base titration the known acid is taken in burette
and the 20ml base is pipetted out into conical flask
than 2 drops of methyl orange is added the colour appears as orange
b.at middle of the titration the neutralization process occur (i.e) the change in colour gradually occurs by the addition of acid into conical flask contain base with some indicator
c.at the end of the titration the orange colour changes to pink colour