* * Finding unknown acid concentration

[santal0l]

*urgent* Finding unknown acid concentration

Homework Statement

Construct an experimental procedure in in order to determine the unknown concentration of an acid. Be sure to describe the standardization process.

Homework Equations

The Attempt at a Solution

I think a viable procedure could be to have a set amount of the acid and an indicator
and add base until an endpoint is reached. not sure please help fast :S

 

[Borek]

Your idea is correct, google "titration" for a procedure details and discussion.

 

[Blueshift5]

To determine the unknown concentration of an acid, you will need to perform a titration experiment. First, prepare a known concentration of a strong base, such as sodium hydroxide. Then, using a burette, add the base to a known volume of the unknown acid solution until the endpoint is reached. The endpoint can be determined by using an indicator, such as phenolphthalein, which will change color when all the acid has been neutralized by the base.

To standardize the solution, you will need to perform a back titration. This involves adding excess base to a known volume of the acid solution and then titrating the excess base with a standard solution of an acid. This will allow you to accurately determine the concentration of the base and, in turn, the concentration of the acid.

Once the standardization process is complete, you can then use the known concentration of the base and the volume used in the titration to calculate the concentration of the unknown acid solution using the equation: concentration of acid = (concentration of base * volume of base used) / volume of acid used.

It is important to ensure that all equipment is properly calibrated and that the titration is performed accurately and precisely to obtain reliable results. Additionally, it is recommended to repeat the titration at least three times to obtain an average value and ensure accuracy.

I hope this helps in your experiment. Best of luck!