Thymol Blue Colored Solution

After thymol blue was added, the pH-buffered samples developed the colors of red, yellow, green, and blue as the pH of the solutions increased (Figure 3.1A). The pH-2 buffer turned to a light red-pink color, while pH-3 to pH-6 displayed very similar forms of rich yellow or light orange (Figure 3.1A). The neutral pH buffer solution appeared as a saffron green colored solution (Figure 3.1A). A mixture of yellow and green was apparent in the dijon color of the pH-8 buffer (Figure 3.1A). The buffer solution of pH-9 expressed a color that seemed to be a mixture of green and blue, reflecting a shade of marine blue (Figure 3.1A). High pH leve1 buffer solutions of 10, 11, and 12 yielded the same tone of a dark blue color (Figure 3.1A). Change in color was also observed in the unknown solutions when mixed with thymol blue (Figure 3.1B). The unknown solutions B and F formed a pink-purple colored solution (Figure 3.1B). Unknown D and A solutions had a similar tint of light orange or deep yellow (Figure 3.1B). On the other hand, the unknown solutions C and E reflect a darker shade of blue (Figure 3.1B). In the known and unknown samples, …show more content…
The results displayed similar shades of certain colors when thymol blue was exposed to different pH levels, such as pH level 3 to 6 and pH level 10 to pH 12. This increases inaccuracy or creates complications to be exact when guessing the pH level for the unknown solutions. Although unknown A and unknown D looked similar, we estimated unknown A as a pH 6 solution for its darker appearance and labeled unknown D a pH 5 solution respectively. We used the same method in labeling unknown E as a pH 11 solution and C as a pH 10 solution, while both possessed a synonymous color of blue. Unknown B and unknown F solutions were assigned pH 1, since they reflect a darker shade of a red, purple-pink tone that could be observed on the pH-2