Chemlab Week 5 Essay

Name: Marquetta Turner iLab, Week #5

UNKNOWN ACID AND BASE TITRATION

Introduction
I found the purpose of this experiment to be use a acid-base titration to determine the concentration of a hydrochloric acid.
During this experiment, I came to a summary that acid-base titrations are great to learn about the nature and the solutions of an acid and a base. When the acid and base came together, an equal point was noticed. I was able to find this with the indicator from when it changed colors. That told me it was the end point of the titration.
When I added the base to the acid, I noticed that the indicator in the acid turned pink after reaching the end of the titration.

Procedure

Part 1:
First I had to measure the pH of 0.1 M hydrochloric acid. Get a 100 mL beaker from the equipment menu Right click on the beaker, select chemicals, and add 50 mL of 0.1 M hydrochloric acid. Measure the solution by right clicking on the beaker and choose pH meter
Then I had to measure the pH of 0.1 M sodium hydroxide Get a 100 mL beaker from the equipment menu Right click on the beaker, select chemicals, and add 50 mL of 0.1 M sodium hydroxide. Measure the solution by right clicking on the beaker and choose pH meter
Part 2:
First add 35 ml of unknown acid a to 100 mL beaker.
Select all chemicals from the toolbar in the chemicals section, choose unknown acid a.
Put the volume at 35 mL in a new 100 mL beaker.
Then add two drops of phenolphthalein indicator to the beaker by right clicking, choosing indications, and adding 2 drops of phenolphthalein. Next is obtaining a 50 mL buret and to fill it 50 mL of 0.1 M NaOH solution. Do this by right-clicking on the working area, select a 50 mL buret, right-click on the buret, and choose Chemicals. The last step is to Titrat Unknown Acid A with NaOH until the end point. Once again, right click on the working area, right click the beaker, choose pH meter, right click on the buret, choose Titration dialog box, right lick on the beaker and choose collect titration data, begin the titration by opening the stopcock of the buret with the command in the titration dialog box.

Observations and Results

Part I: Solution | pH | 0.1 M HCl | 1.00 | 0.1 M NaOH | 13.00 |

Part II:

Volume of 0.1 M NaOH at equivalence

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