These color changes indicate a chemical change, which show that a reaction had occurred. In the first step when o-vanillin and p-toludine, imine was formed. The color change from green to orange suggests that imine appears as orange colored. In the second step, the addition of sodium borohydride reduced the imine into another derivative, which was yellowish lime color. The solution turned clear when acids and anhydrides was added, which indicated the precipitate were dissolved.
The third experiment tested if the samples were made of cells. To test this factor, we put the substances underneath the microscope. By adding methylene blue to one of the two of each substance sample, you could observe if cells were present which would be a sign of life. In the experiment we observed that Vial B had cells and the Vial A did not.
When the substance reacted with the solution it turned from its initial color yellow/brown to its final color lilac/violet. The experiment went by easily flowing nicely, although one or two things went wrong, none had any effect on the experiment. It is very important to know what foods are composed of because, knowing what is inside our food is essential for our health. We need to be aware of what things we are consuming and what we should be consuming for our bodies to function properly.
When we collected liquid from our distillation separation method, liquids #5 and #4 came out clear (without the food coloring). We believe solid #6 is what made our sludge purple. The density of food coloring is the same as water: 1 gram per square millimeter, our density was very close to this it was 0.51g/ cm3 and we could have made mistakes when reading the graduated cylinder.
When we finished the experiment we still did not known what the blue substance was. So we did a few test to see what it could be. First we put ammonia into the clear liquid and it turned into a colorless jelly substance. We knew that
My hypothesis, is that we started out with Bromphenol Blue as our first unknown dye and Gentian Violet as our Second Unknown Dye. This is solely based on initial color. Materials and Methods: For the experiment we started off by splitting our group of four into two groups of two. Each group took a micropipettor and transferred 10-µL of our unknown dye into the agarose gel well designated for us. Once all the dyes were placed in the agarose gel, the lab assistant connected the electrophoresis apparatus to a power supply and applied an electrical field to the agarose gel.
If we add cobalt (II) chloride and sodium hydroxide, then it will produce sodium chloride and cobalt phosphate and create a purple color. The data we collected fully supports both hypotheses. When we mixed the reactants together, they both created the color they were expected to be and what we researched. However, the effectiveness of the nail polish wasn’t what we expected at first. First, the blue polish appeared to have little chunks of the dried precipitate on the nail.
The light that was seen was recognizable according to each individual element. So upon the examination of mineral
This shows the expansion of the food coloring and how rapid it is compared to the half and half. This means my hypothesis was incorrect and the fact that the soap made the color burst throughout the milk. My thought was the milk was to thick which would make the color or the dye just stay underneath the surface.
The chemistry of dyeing has been around for a pretty long time, proving that it is an important process to most civilizations. In fact the process has been common since as far as 2600 BC. Back then dyes were made of natural pigments mixed with oil or water to decorate items and caves. Fast forward to over two hundred years ago and dyes were extremely important during the first industrial revolution. They helped boost the textile industry and motivated scientists to research the composition of natural dyes.
Most oil paints had gone through dramatic changes in the 18th and 19th century to the point where “Color men” the art dealers that actually made the paints were using mineral based paints (Bomford 32). Cobalt Blue made from Cobalt Oxide and Emerald Green made from copper elements, vinegar, and white Arsenic acetic acid (Bomford 58). Impressionists considered these materials to be very high in quality and did produce several desired results, even Monet was said to use a great deal of Emerald Green and Lead based whites (Bomford 60 and 67). Despite the dangerous elements of these paints Monet lived into the
The growing market increased the availability of new pigments such as the Lapis Azuli. A change in the status
In the blue dye experiment the dye in the hot water moved faster than the dye in the cold water because molecules move faster when heated than molecules in cold water. In the hot beaker the water molecules attracted each other faster because molecules move faster in hot water. In the cold beaker the water molecules attracted each other but molecules move slower in cold water. The pattern of the cold water was stringy because the molecules move slower so the dye spread out slower. The pattern in the hot beaker spread out pretty fast but the dye did not go to the bottom of the beaker because heat rises.
During the experiment, a colourless solution of potassium iodide and a solution of sodium persulfate, starch and thiosulfate will be combined into a beaker to later react into a blue-black complex. The elapsed time from when colourless solutions are combined to the colour change is dependent on the reactant concentrations of sodium persulfate and potassium iodide. Experiments will be conducted by systematically varying the concentrations of persulfate and iodine. The times recorded will be utilised to determine the rate of reaction and
This allowed the painters’ primaries (red, blue, yellow) to be arranged opposite to their complementary colors to indicate the complementary enhancing the others effect through optical
