Respuesta :

malak17

Answer:

1) Set up and clean all equipment as in the diagram.

2) Measure a known volume of alkali into a conical flask using a pipette.

3) Add an indicator to the solution.

4) Pour the acid of known concentration into a burette, which has been washed with some of the acid

5) Record the reading on the Burette and open the tap.

6) Swirl the conical flask to mix the acid and alkali.

7) Repeat steps 5 and 6 until the alkali changes colour.

8) Repeat 3 times until you get 3 results close to each other.

9) Take an average.

10) Use info to calculate the concentration of the alkali.

I hope this helps you get the idea!

DreamGirl456

Answer:

Titration is a procedure in which a solution is called the titrant. Whose concentration is known very accurately is dispensed by a burette and reacted with a known volume of another solution of unknown concentration is called the analyte. By measuring the amount of titrant needed to neutralize the analyte, you can determine the concentration of the analyte very accurately.The "end point" of a titration is the point at which the titration is complete, typically when an added indicator solution such as phenolphthalein changes color. The "equivalence point" is closely related to but not necessarily identical with the end point. The equivalence point is the point at which the number of moles (or equivalents) of titrant exactly equals the number of moles (or equivalents) of analyte.Ideally, the end point should exactly equal the equivalence point, but in the real world they are slightly different.

For example, titrate a hydrochloric acid analyte with a sodium hydroxide titrant, using phenolphthalein as an indicator. Phenolphthalein is colorless in acid solutions, and pink in base solutions, but no color change occurs until the pH of the solution reaches about 8.2, well into the basic range.