Question One: Chemical Kinetics -The Use of Luminol to Detect Blood
1.1 Introduction
When investigators want to find blood at crime scenes that may have been cleaned up, they would apply a substance called luminol. When luminol is applied to a surface that had blood on it, the blood will illuminate as a blue-green colour. The IUPAC way to name luminol is 5-Amino-2,3-dihydro-1,4-phthalazinedione.
1.2 Results and Analysis
1.2.1 Tables 1 and 2
When observing the consumption of luminol in proportion to time in a solution that included the blood, also known as Experiment 1, it was required to know the natural logarithm of the concentration of luminol. After each recorded concentration of luminol had been completed, it was also required to find …show more content…
A potential reason for why the reaction of saliva is much slower then blood is due to salvia not contain any iron in it[1]. During the reaction, the iron could be acting as a catalyst and speeding up the rate the reaction is occurring at between the hydrogen peroxide and the luminol. Since there is no iron found within human saliva, there would no way that the rate of the reaction would be able to be the same as found iron is found within the …show more content…
Table 4 – The results that were determined when the linear regression analysis was used, showing the acceleration, acceleration standard error, intercepts, and Intercept Standard Errors of the truck shown below.
Acceleration,
a (m/s) Acceleration Standard Error [±m/s^2] Intercept [m/s] Intercept Standard Error [±m/s]
0.4750 0.01182 0.06267 0.2200
The residual mean and the residual standard error have also been calculated. This has been displayed in Table 5.
Table 5 –The results that were determined when the linear regression analysis was used, showing the residual mean and the residual standard error.
Residual Mean Residual Standard Error
-2.665E-16 0.09601
2.2.2 Graph 4 and 5
After achieving a statistical method of displaying the relationship between the velocity that the truck was travelling and the time that the truck took to achieve that velocity. It has been displayed in Figure
1.1 Introduction
When investigators want to find blood at crime scenes that may have been cleaned up, they would apply a substance called luminol. When luminol is applied to a surface that had blood on it, the blood will illuminate as a blue-green colour. The IUPAC way to name luminol is 5-Amino-2,3-dihydro-1,4-phthalazinedione.
1.2 Results and Analysis
1.2.1 Tables 1 and 2
When observing the consumption of luminol in proportion to time in a solution that included the blood, also known as Experiment 1, it was required to know the natural logarithm of the concentration of luminol. After each recorded concentration of luminol had been completed, it was also required to find …show more content…
A potential reason for why the reaction of saliva is much slower then blood is due to salvia not contain any iron in it[1]. During the reaction, the iron could be acting as a catalyst and speeding up the rate the reaction is occurring at between the hydrogen peroxide and the luminol. Since there is no iron found within human saliva, there would no way that the rate of the reaction would be able to be the same as found iron is found within the …show more content…
Table 4 – The results that were determined when the linear regression analysis was used, showing the acceleration, acceleration standard error, intercepts, and Intercept Standard Errors of the truck shown below.
Acceleration,
a (m/s) Acceleration Standard Error [±m/s^2] Intercept [m/s] Intercept Standard Error [±m/s]
0.4750 0.01182 0.06267 0.2200
The residual mean and the residual standard error have also been calculated. This has been displayed in Table 5.
Table 5 –The results that were determined when the linear regression analysis was used, showing the residual mean and the residual standard error.
Residual Mean Residual Standard Error
-2.665E-16 0.09601
2.2.2 Graph 4 and 5
After achieving a statistical method of displaying the relationship between the velocity that the truck was travelling and the time that the truck took to achieve that velocity. It has been displayed in Figure