The biuret solution used in the biuret test for peptide bonds is blue in the absence of peptide bonds or biuret which also results in a positive result. A positive result for peptide bonds or biuret is apparent as the biuret solution turns purple/violet in color.
The color remain red because vinegar is an acidic solution.
FeCI2 is a combination of iron and hydrochloride. This solution starts out as a yellowish green color. When the equivalence point is reach the solution turns to an orange brown color.
1. Add 5 cm3 dilute sodium hydroxide (caustic!) to a 1% solution of albumen (the white part of an egg)2. Then add 1% copper sulphate solution3. A purple colour appears and this indicates that protein is present.
the information processor in a visual color measuring system is the human brain.
Yellow.
Lugol's solution is a solution of iodine (1-5%) and potassium iodide in water. So the solution should have the pale color of iodine and the color should be pale (light) brown.
The color of iron (III) chloride solution is brown.
Any color is possible.
The color of the paper changes based on the acidity or alkalinity of the solution it is dipped in. By comparing the color of the paper to a pH color chart, the pH of the solution can be determined.
Colorless
2 percent bromine solution typically has a reddish-brown color.
A solution can still contain color, but also be clear. Take a pool for example, the water is slightly blue but you can still see through it. A colorless solution is when there is no color, like water in a store bought water bottle.
A nickel sulfate solution is typically blue-green in color. The exact hue can vary depending on the concentration of the solution.
white color solid and colorless solution
Iron III sulfate solution is typically pale yellow in color.
A cobalt sulfate solution is typically blue in color.
The solution color of cupric oxide is blue to green.