Csa Report

CSA Report

After scanning through all of the unidentified substances, including the powders and liquids found at the scene of the crime, our lab was successfully able to indicate the concentration of H⁺ in the substances, also known as the pH. The pH scale is depicted as a scale or number line with numbers going from 0 to 14. The numbers between 0 and 6 indicate that the substance is an acid, with its acidity increasing as it reaches the number 0, whereas the numbers between 8 and 14 indicate that the substance is a base. The number 7 indicates that the substance is neutral, such as pure water. The Crime Scene Technician tentatively assured us that the red liquid was blood, but we were able to depict that it was not. Blood has an exact pH of 7.4 due to the fact that it is needed that way for the maintenance of homeostasis in the body. If the blood were any more acidic, with a lower pH level, we would be prone to more diseases. However, after checking the pH of the red liquid, it turned out that it had a low pH of 4, therefore it could not have been blood. In addition, the CST was unable to identify the dry solid substances, although, with the predictions of the suspects, they suggested they were simply table salt. As a result to that, we checked the pH of salt and found that it was a 7 on the scale and used it as a comparison to the other unknown substances. Solid A and Solid B were suspected to be table salt, but after identifying their pH, it was discovered that both were neither salt, nor the same substance. Solid A had a pH of 3, being more acidic, whereas solid B had a pH of 8, being more of a base. However, solid F came out being salt, seeing as it had an exact pH of 7 on the scale. The remaining liquids were found to all have a different pH in comparison to one another. Liquid C had a pH of 1, meaning it was extremely acidic and liquid D had a pH of 14, meaning it was extremely basic. That left us with determining the pH of the purple liquid and colorless...