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Titration is an analytical tool to determine the concentration of an acid or basic solution. It is based on the neutralization process.
Typology: Study notes
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To study the titration process. To follow changes in the pH during the titration process while adding a strong base to a strong acid. To use a drop counter in order to get a pH versus volume (in drops) graph.
PC + NeuLogTM^ software
USB-200 module
NUL-206 pH logger sensor
NUL- 223 Drop Counter logger sensor
Utility stand 1 Right angle clamp 2 Extension clamp 1 Burette 1 50 ml beaker 2 250 ml beaker 1 Pasteur pipette 1 Wash bottle 1 Plastic container 1
The items above are included in the NeuLog Utility accessories, UTL-KIT (only one right angle clamp is included).
50 ml of 0.05 M HCl 1 01 ml of 0.5 M NaOH 1 Water for the wash bottle 1 30 ml of pH 7 buffer solution 1
Titration is an analytical tool to determine the concentration of an acid or basic solution. It is based on the neutralization process. Neutralization occurs when the hydronium ion from an acid interacts with a hydroxide ion from a base, on a one to one basis, forming water in the process. A salt is always a byproduct of this type of reaction. Titration is the progressive addition of an acid to a base, or vice-versa, to achieve neutralization. The point at which the acid and base are in equivalent amounts is called the equivalence or end point.
One common example for acid-base titration is the use of a hydrochloric acid solution, HCl, with a basic sodium hydroxide solution, NaOH. This is an example of a titration of a strong acid with a strong base.
In this experiment you will conduct a titration in which this reaction occurs. You will determine the equivalence point and plot a pH verses volume (in drops) graph.
HCl NaOH H 2 O NaCl
Sensor setup
Note:
The following software functions are explained in short. It is recommended to practice the NeuLogTM^ software functions (as described in the user manual) beforehand.
Settings
Experiment duration to 10 minutes Sampling rate to 20 per second
Module Setup
on the Zeroing button. Notice that the drops in the drop counter window are reset to 0.
Click on the Experiment setup icon , click on the XY graph tab and choose sensor; then choose drop counter. You will get a graph of the pH of the solution against the added NaOH solution drops.