You are required to plan and design an investigation to test the following hypothesis
Black inks from three different brands of permanent makers contains different dyes.
I want to know how to go about doing this lab
What Aim must be use?
What is the Hypothesis?
What are the Apparatus and Materials that would be used?
What is the Method that must be follow?
What are the Expexted Results that may occur?
What are the Treatment of result?
Assuption about the lab
What are Sources of error that may occur?
1. I don't understand "What Aim...."
2. The hypothesis is written in the problem beginning with "Black inks from three different brands......."
3. The remainder of these questions can be found at this excellent site---it even does a separation of inks experiment.
http://www.chemguide.co.uk/analysis/chromatography/paper.html
To investigate the hypothesis that black inks from three different brands of permanent markers contain different dyes, you can follow these steps:
Aim: The aim of this investigation is to determine if the black inks from three different brands of permanent markers contain different dyes.
Hypothesis: The hypothesis is that black inks from different brands of permanent markers contain different dyes.
Apparatus and Materials:
1. Three different brands of black permanent markers
2. White filter paper or chromatography paper
3. Test tubes or small glass containers
4. Solvent (such as water or rubbing alcohol)
5. Pencil or ruler for marking the paper
6. Gloves and safety goggles (to ensure personal safety)
Method:
1. Start by setting up a working area with proper ventilation.
2. Gather the three different brands of black permanent markers.
3. Put on gloves and safety goggles to protect yourself.
4. Cut small strips of white filter paper, ensuring they're long enough to fit into the test tubes or containers later.
5. Take one marker and draw a small dot with the black ink near the bottom of one filter paper strip. Repeat this step for each brand, ensuring each dot is distinct and separate.
6. Pour a small amount of solvent (such as water or rubbing alcohol) into a test tube or glass container. The level of the solvent should not be higher than the level of the drawn dots on the filter paper strips.
7. Carefully place each filter paper strip, with the drawn dots facing down, into the test tubes or containers so that the bottom of the paper strip is submerged in the solvent. Make sure the dots do not touch the solvent.
8. Allow the filter paper strips to stay undisturbed in the test tubes or containers for a given period of time (e.g., 20-30 minutes).
9. Observe the movement of the ink on the filter paper strips. Note the presence of any bands or colors that separate from the black ink dot.
10. Record your observations and note any differences or similarities between the three brands.
Expected Results:
If the hypothesis is correct, the black inks from the three different brands of permanent markers will exhibit different colors or bands separating from the black ink dots on the filter paper strips.
Treatment of Results:
After the experiment, analyze the results by comparing the color separation and the differences between the filter paper strips from each brand of markers. Record any distinct bands or colors and note any similarities or differences.
Assumptions about the Lab:
Some assumptions that can be made for this investigation are that the permanent markers are of good quality and that the chosen solvent is suitable for this experiment. Additionally, it is assumed that the filter paper strips were cut uniformly and are of the same type and quality.
Sources of Error:
Potential sources of error in this investigation may include:
1. Inconsistent application of dot sizes or pressure while drawing the dots on the filter paper.
2. Uneven saturation or contact of the solvent with the filter paper strips.
3. Impurities or contamination in the markers or solvent used.
4. Environmental factors such as humidity and temperature that may affect the movement of the ink on the filter paper strips.
It is important to be aware of these potential errors so that you can control them as much as possible and obtain reliable results.