Titration

Exp

6

Titration Curves

In the previous pH lab and in Chem101L you hold titrated strong and weak erosives with a base using an indication and used the data you obtained to destine the concentration of the acids. From the concentration of the acid you could then determine the pH of the acidic solutions. In the weather lab you also used the Microlab to measure the pH of a number of solutionsusing a pH sensor. There is a respectable amount of information that can be obtained if you measure the pH of a solution during a titration. This can be through with(p) by adding a microscopical amount of titrant then halt and measuring the pH with a pH meter, adding another small amount of titrant and repeating the process until the indicator changes color. A bandage of the pH data verses the volume of titrant added is called a titration curve. Lets look at an example of the titration of 10 mL of 0.1M HCl with 0.1M NaOH.
14 12 10 p H 8 6 4 2 0 0 5 10 15 mess 20 25 30

In this example we go that the peculiarity focalize , also called the equivalence point, of the titration will occur when 10 mL of base has been added. This is the volume where the color of the indicator would yield changed. So you can see that in this shift we self-possessed pH data well past the ending point.



The starting thing you probably noticed is that there is a immense change in the pH of the solution at the end point. In fact this feature of the graph allows you to accurately determine the end point of the titration...no indicator needed! Of course you wont be able to determine the end point accurately until you have gone past it during the titration. ( In that case the end point wasnt the end of the titration, which is why more chemists prefer the term equivalence point). Now assume that we know nothing about the conditions present during the titration. An experienced chemist could shut away deduce quite a bit of information. For instance this is apparently the titration of an acid with a base, because the pH starts off acidic ( less(prenominal) than...If you want to get a full essay, order it on our website: Orderessay



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