What Can pH Titration Tell Us

What Can pH Titration Tell Us - 1 What Can pH Titration...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 What Can pH Titration Tell Us? Goal: To determine the molecular weight of unknown acid “D” by adding 0.1 M drops of HCL acid at a time and recording observations of the reaction and the final pH. Objective: By following the procedure, one should be able to determine the pH of the solution by using a pH probe, that will then all you to create a plot graph. On the plot graph you should be able to determine the equivalence point. With the equivalence point found, the pH and the unknown molecular weight of the acid should be obtainable through the appropriate calculations. Introduction: A buffer is basically a solution made up of an acid and its conjugate base that try to keep the pH of the solution at a fairly constant. The way a buffer works, is by reacting with either the acid or base. However, the buffer will react differently depending on the strength, or lack there of, of the acid or base. When mixed with a strong base and a strong acid, the pH will remain about 7. If it is mixed with a weak acid and a strong base, the pH will rise above 7 becoming more acidic. Finally, if it is a combination of a strong acid and a weak base the pH will drop below 7 becoming more of a base. Buffers are not just something found in chemistry labs; no instead they have a very significant purpose in the field of medicine. One good example of this would be the pH of urine. If the pH increases too much the urine will be come very acidic and a person will have a lot of pain when trying to urinate. A buffer can help maintain or re-obtain a pleasant pH in the body. Material: Ph probe, HCL, NaOH, 100mL volumetric flask, volumetric pipets, buret, magnet stir bar, and a stir plate. Procedure: Before starting the experiment you need to first gather all your materials which include: Ph probe, HCL, NaOH, 100mL volumetric flask, volumetric pipets, buret, magnet stir bar, and a stir plate. Now that all that all the materials are gathered take your pH probe and calibrate it. To do this check to make sure that the pH probe is connected to the amplifier box, if it is not then take the BNC connector of the electrode cable and plug it into the mating connector on the pH Amplifier box and then turn the BNC connector to
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/13/2008 for the course CHEM 184, 188 taught by Professor Hurel during the Spring '08 term at Kansas.

Page1 / 6

What Can pH Titration Tell Us - 1 What Can pH Titration...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online