Titration of TRIS with HCl 1. Which indicator is best for standardizing HCl? Explain. 2. Write...

Titration of TRIS with HCl

1. Which indicator is best for standardizing HCl? Explain.

2. Write out the reaction taking place and draw chemical structures.

3. Do your experimental results agree with what you predicted before the lab?

4. Explain why you should never use more than a few drops of indicator and why the number of drops you use should be consistent over the course of your experiment.

Expert Solution

1. HCl is a strong acid, hence methyl orange is the best suitable indicator for standardizing HCl.

Note: Methyl red, Thymol blue can also be used.

2. The reaction between Tris-base and HCl form Tris-HCl salt can be written as follows.

3. Note: Experimental results were not shown here.

In general, if you do the experiment accurately, then the experimental results do agree with what you predicted before the lab.

4. You should never use more than a few drops of an indicator because the indicator will indicate the completion of the titration. If you don't add it carefully, you can't able to identify the completion of the titration. The no. of drops should be consistent over the course of your experiment to avoid experimental error and to get accurate results.

queen_honey_blossom answered 2 years ago

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