In our experiment, there was a source of error because in the Concentration vs. Absorbance graph’s line of best fit, there was a y-intercept, but there isn’t suppose to be one since the concentration is 0, the absorbance should be 0. There are no particles in the solution, distilled water, so nothing should be absorbed. This error could have been caused by the leaving the diluted solution out too long, so the water in the solution could have evaporated, leaving only the blue dye. It is not a diluted solution if there is just dye left in the beaker because it would go be a higher concentration than the actual solution’s concentration…
2. After the nails were allowed to react, did the solution change color? What was…
6. You are given an unknown type of clothing dye. How could you use the procedures in this lab to see if this dye is a mixture?…
chemical Brite, It was observed that the Bromthymol Blue changed to a green color that was not…
2. The stirring furthered the reaction so it changed more towards blue as it was mixed.…
Discussion of Theory: Chromatography, resolution and selectivity played major roles in making the experiment work. The experiment demonstrated a common use of chromatography, and works to explain a way to separate mixtures. The dyes were successfully separated and analyzed in the cartridge.…
The purpose of this test is to see what colors are in certain colors. We use chromatography to separate them/…
White tile: The tile was used to be able to observe the colour change of the solution in the conical flask better. By placing the white tile it allowed us to see the colour change more easily and quickly therefore increasing our chances of closing the burette tap on time and giving us closer and possibly more accurate results. If non clear paper was used or no paper at all, the colour change of the solution would not have been spotted as quickly therefore increasing the time taken to close the burette tap to stop sodium hydroxide being added to the vinegar solution. The increase of sodium hydroxide solution would mean that the results obtained would not be the accurate or close to the accurate value.…
e. NaOCl + blue dye E1 Bright blue that dissolved to yellow Same; just easier to see…
The purpose of this experiment was to observe the color change and the concentration to determine the…
4) Do you think there was a difference in the amount of charge on one of the dye molecules? Explain the reasoning for your…
Prior to embarking on laboratory exercises, students need instruction on Health and Safety procedures. Learners would watch a video clip about working with dangerous chemicals and be given informative hand-outs, which would also be sent to students via email. Students would then watch a demonstration on how to accurately measure chemicals, make up dyestuffs, monitor development time and colour grade results. Students then follow a written recipe themselves and assess their…
What might you have used in the above experiment in order to see a visible color change in the solution? At what pH would the solution have been neutral?…
Today in lab I will separate mixtures of compounds into their constituent components using chromatography paper and an eluting solvent of salt water as well as rubbing alcohol.…
The onion is any of a variety of plants in the genus Allium, specifically Allium cepa. Allium cepa is also known as the "garden onion" or "bulb" onion. Above ground, the onion shows only a single vertical shoot; the bulb grows underground, and is used for energy storage, leading to the possibility of confusion with a tuber, which it is not.[1] It is a close relative to garlic.…