Standard Acid Solution example essay topic
446 words
Standardization of a Base When standardizing a substance, you are finding the concentration of that substance. The most common way to do this is by titration. In this experiment I took a standardized base and titrated it with a know and an unknown acid. A standard solution has an accurate concentration.
To standardize a base, everything must be standardized. A titration must be done with a standard acid solution. While trying to figure out the concentration I added a standard solution to a known volume of a sample until a desired endpoint, in our experiment the endpoint was a change in color of the substance. The standard solution in this experiment was H 2 C 2 O 4 + 2 H 2 O, which is also known as oxalic acid. Since the concentration of the acid is known, it will be what is used to standardize the base.
The materials needed for this experiment are as follows: a buret; two 400 milliliter beakers; 50 milliliter graduated cylinder; phenopthalein; H 2 C 2 O 4 + 2 H 2 O; 50 milliliter beaker; 125 milliliter Erlenmeyer flask; distilled water; NaOH; and KHC 4 H 4 O 6. In setting up the experiment I filled all of the containers with the correct substance and labeled them. I then weighed all of the substances and their containers and recorded all of this information. Once I mixed the acid solution I added phenopthelein which was the indicator that showed the color change. I then added NaOH to the solution until the solution turned pink then recorded the final volume of the beaker.
After all of the calculations, including all of the volumes and moles of all the substances and their containers, and experimentation I ended up with the concentration of the acid being. 1263 Molar. This made for a 24.8% deviation. The reason for the high deviation is because of the content of NaOH added to the solution, that fact that I added to much is what you can attribute the high deviation to.
I could tell because the color of the solution was too dark. The results of my experiment were not completely perfect, my deviation was higher than expected, but there is nothing wrong with that. If you wanted to do this experiment and have more success you could have a more precise way of adding the NaOH to the acid. To avoid many mistake do not use a beaker too big because it is less accurate as well.
All together this was a successful experiment.
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