Table of Contents
- 1 What element made some of the solutions turn blue in color?
- 2 Why does the iodine clock reaction turn blue?
- 3 Is sodium hydroxide and phenolphthalein a chemical change?
- 4 What is methylene blue made of?
- 5 What Colour is chlorine solution?
- 6 Which species is responsible for the blue color that appears during the iodine clock reaction?
- 7 What’s the chemical reaction that changes color from clear to blue?
- 8 Why are transition metals different colors in aqueous solution?
What element made some of the solutions turn blue in color?
Iodine Test: When following the changes in some inorganic oxidation reduction reactions, iodine may be used as an indicator to follow the changes of iodide ion and iodine element. Soluble starch solution is added. Only iodine element in the presence of iodide ion will give the characteristic blue black color.
What is blue solution in chemistry?
Methylene blue is an aromatic compound that produces a blue solution when dissolved in water. It is a redox indicator and relies on electron transfer rather than changes in hydrogen ion concentration to change colour. On shaking, the solution turns blue, and on standing, the solution returns to colourless.
Why does the iodine clock reaction turn blue?
In an iodine clock reaction, the blue color is due to the starch–iodine complex, but the compound that is “trapped” by thio sulfate ions is iodine itself, which is reduced back to colorless iodide ions.
What chemicals can turn water blue?
Ammonia is a base, so when you mixed the acidic vinegar solution with ammonia, it raised the pH and the water turned blue.
Is sodium hydroxide and phenolphthalein a chemical change?
THe experiment result are : NaOH and phenolphthalein- First there was phenolphthalein in the test tube, then he add sodium hydroxide. There is when the half starts to change to purple color and after mixing it, it completely turns purple. chemical change.
What gives the methylene blue dye its ionic blue color?
Methylthioninium chloride, commonly called methylene blue, is a salt used as a dye and as a medication. Methylene blue is a thiazine dye. It works by converting the ferric iron in hemoglobin to ferrous iron….Methylene blue.
| Clinical data | |
|---|---|
| Formula | C16H18ClN3S |
| Molar mass | 319.85 g·mol−1 |
| 3D model (JSmol) | Interactive image |
| show SMILES |
What is methylene blue made of?
Methylene blue is an organic chloride salt having 3,7-bis(dimethylamino)phenothiazin-5-ium as the counterion. A commonly used dye that also exhibits antioxidant, antimalarial, antidepressant and cardioprotective properties. It has a role as an EC 1.4.
What Colour is bromine solution?
orange
Bromine water is an orange solution of bromine. It becomes colourless when it is shaken with an alkene. Alkenes can decolourise bromine water, but alkanes cannot.
What Colour is chlorine solution?
pale yellow-green
Teaching notes
| Colour after shaking with hydrocarbon solvent | |
|---|---|
| Chlorine water | Aqueous layer: pale yellow-green to colourless Hydrocarbon layer: colourless to pale yellow-green |
| Bromine water | Aqueous layer: yellow-orange to colourless Hydrocarbon layer: colourless to pale yellow-orange |
Why did your solution turn bluish purple after a short period of time?
Two colourless solutions are mixed and at first there is no visible reaction. After a short time delay, the liquid suddenly turns to a shade of dark blue due to the formation of a triiodide–starch complex.
Which species is responsible for the blue color that appears during the iodine clock reaction?
In Reaction # 1 iodide ions react with hydrogen peroxide to produce iodine element which is blue in the presence of starch.
What causes a change in color from blue to purple?
A change of color to a blue-black or purple color suggests that starch is present. If there is no change in color, this suggests no starch is detectable.
What’s the chemical reaction that changes color from clear to blue?
Medioimages/Photodisc, Getty Images. The classic ‘blue bottle’ color change reaction uses methylene blue in a reaction that changes color from clear to blue and back to blue. Other indicators work, too, so you can change colors from red to clear to red (resazurin) or from green to red/yellow to green (indigo carmine).
What can you use to change the color of a solution?
You can use indigo carmine to prepare a solution that changes color from green to red, making an excellent Christmas chemistry demonstration. Actually, the initial solution is blue, which changes to green and finally to red/yellow. The color of the solution can be cycled between green and red.
Why are transition metals different colors in aqueous solution?
Different elements may produce different colors from each other. Also, different charges of one transition metal can result in different colors. Another factor is the chemical composition of the ligand. The same charge on a metal ion may produce a different color depending on the ligand it binds.