DISCUSSION:
This experiment was conducted to determine the iron content in a breakfast cereal. The results indicate 39% iron in a sample of Kix cereal. This value is slightly lower than the 43% listed on the cereal box. The difference may be attributed to the spectrometer not being set exactly to zero as well as to some of the chemistry and handling involved in preparing the solution.
Another reason why the iron sample percentage didn’t match up with the box of cereals iron content may be because during the process of transferring the burned cereal to the HCL beaker some of the cereal may have been still left in the crucible. In figure B, the coefficient of regression is 0.9989 which correlates well with the plot of absorbance versus concentration.
Dr. Bob can you help me get a concluding sentence to my discussion please
This experiment was conducted to determine the iron content in a breakfast cereal. The results indicate 39% iron in a sample of Kix cereal. This value is slightly lower than the 43% listed on the cereal box. The difference may be attributed to the spectrometer not being set exactly to zero at the beginning of the measurement as well as to some of the chemistry and handling involved in preparing the solution. We already have this statement about handling involved in preparing the solution so I think you just fold in the for example statement For example,
Another reason why the iron sample percentage didn’t match up with the box of cereals iron content may be because during the process of transferring the burned cereal to the HCL(use HCl--no capital L) beaker some of the cereal may have been still(omit still) left in the crucible. In figure B, the coefficient of regression is 0.9989 which correlates well with the plot of absorbance versus concentration. You need to check to make sure that plot B actually is a plot of A vs concentration. I may have put words in your mouth.;-)
Try something like this for a closing sentence--actually two sentences. The accuracy of the determination could be improved by using a better method for transferring the sample after the burning stage. Replicate samples should be performed in order to determine the precision of the method.
In this experiment, the goal was to determine the iron content in a breakfast cereal, specifically Kix cereal. The results of the experiment showed that the iron content in the sample of Kix cereal was 39%. However, this value is slightly lower than the 43% that is listed on the cereal box.
There are a few factors that could contribute to this difference in iron content. One possible reason is that the spectrometer used in the experiment was not set exactly to zero. Spectrometers are devices that measure the intensity of light at different wavelengths, and they are commonly used in analytical chemistry to determine the concentration of elements in a sample. If the spectrometer is not properly calibrated, it can lead to inaccurate results.
Another factor that could influence the iron content is the chemistry and handling involved in preparing the solution. When determining the iron content in a cereal sample, it is often necessary to dissolve the cereal in a solution and then use various chemical reactions to isolate and measure the iron. If there are errors or inconsistencies in the preparation of the solution or in the chemical reactions, it can affect the accuracy of the final result.
To determine the iron content in a breakfast cereal, a common approach is to use a technique called atomic absorption spectroscopy (AAS). This involves vaporizing the sample and passing it through a flame or a heated graphite furnace, which causes the atoms to emit or absorb electromagnetic radiation at specific wavelengths. By measuring the intensity of this radiation, the concentration of iron can be determined.
To accurately measure the iron content in a cereal, it is important to ensure that the spectrometer is properly calibrated and set to zero before taking measurements. Additionally, careful attention should be paid to the preparation of the sample solution and the execution of the chemical reactions involved in the analysis.
Overall, the slight difference in iron content between the experimental results and the value listed on the cereal box may be attributed to factors such as the spectrometer not being set exactly to zero and errors in the chemistry and handling of the samples.