How to tell if sulfur dioxide or cl2 is fading magenta 10

SO2 is not the same as CL2.

Cl2 is introduced into the purple litmus solution, which turns red first and then fades.

Red: chlorine is acidic when dissolved in water: Cl2 + H2O == HCl + HCl; Fading: bleaching properties of HCOs).

When SO2 is introduced into the purple litmus solution, it will only turn red and will not fade.

Red: SO2 is acidic when dissolved in water: SO2 + H2O == H2SO3; But SO2 does not bleach the acid-base indicator, so it does not fade).

The leg color mechanism of sulfur dioxide is that it binds to pigment molecules, and this binding is reversible. So it makes the magenta fade reversibly, and after heating, the magenta returns to its original color.

The leg color mechanism of chlorine is its strong oxidation, and this change is irreversible. That is, after fading, it will not return to its original color.

Cl2 does not fade magenta.

Hypochlorous acid will fade the magenta.

Have you ever studied chemistry?

Methods for identifying chlorine. There are ...... in the book

Sulfur dioxide can fade the magenta solution. The principle that SO2 can fade the magenta solution is that SO2 is hydrated to synthesize H2SO3, and H2SO3 undergoes an addition reaction with magenta to generate unstable colorless compounds, which fade the magenta solution. This reaction is reversible and can be resumed under heated conditions.

Sulfur dioxide can react with colored substances to form colorless substances and has bleaching, but sulfur dioxide bleaching has temporary characteristics, heating is easy to restore the original color, sulfur dioxide can make the magenta solution fade to reflect sulfur dioxide bleaching, and sulfur dioxide reduction.

Sulfur dioxide uses:

1. It is used as an organic solvent and refrigerant, and is used to refine various lubricating oils.

2. It is mainly used for the production of sulfur trioxide, sulfuric acid, sulfite, thiosulfate, and is also used as fumigant, preservative, disinfectant, reducing agent, etc.

3. Sulfur dioxide is a reductive bleach agent allowed to be used in China. It has a strong inhibitory effect on the bleaching of food and oxidase in plant food. China stipulates that it can be used for wine and fruit wine, and the maximum amount of use and residue shall not be exceeded.

4. Pesticides, man-made fibers, dyes and other industrial sectors.

5. It is used in the production of sulfur and as an insecticide and fungicide.

6. According to Claude Ribbe's book The Crimes of Napoleon, sulphur dioxide was used as a poison by some Haitian monarchs in the early 19th century to suppress slave revolts.

The above content reference: Encyclopedia - sulfur dioxide.

1. Chlorine gas is passed into the magenta solution, and the magenta solution fades (reason: bleaching of the generated HCOs).

2. SO2 passes into the magenta solution, and the magenta solution fades. (Reason: Bleached by SO2, but heating the faded solution, the solution can return to its original color).

3. Equal molar Cl and SO are introduced into the magenta solution at the same time, and the solution will not fade. Cause: Cl and so happen to react completely, and as a result, there is no bleaching substance

cl₂＋so₂＋2h₂o＝2hcl＋h₂so₄

The principle that SO2 can fade the magenta solution is that SO2 is hydrated to synthesize H2SO3, and H2SO3 undergoes an addition reaction with magenta.

Produces an unstable colorless noisy spring compound that fades the magenta solution. This reaction is reversible and can be resumed under heated conditions.

Magenta is a dark red powder. Soluble in water, it is blue red to magenta, slightly soluble in ethanol.

Acetone and fibrinolytic, insoluble in other organic solvents. In case of concentrated sulfuric acid.

It is blue-red, bright red after dilution, and turns orange when it is a crimson solution of concentrated nitric acid. The aqueous solution is magenta with concentrated hydrochloric acid, and sodium hydroxide is added.

The liquid is orange-brown in color. When dyeing, the color of copper and iron ions is slightly blue and dark, and the latter is slightly lighter, and it is rarely affected by chromium ions, and the leveling is good.

Because sulfur dioxide is bleaching (not oxidizing), it can fade the magenta solution. However, since the bleaching of sulfur dioxide is temporary, it is a chemical reaction that produces an unstable substance, and when heated the faded magenta solution, it will also change back to its original color.

Sulfur dioxide is commonly used in industry to bleach pulp, wool, silk, straw hats, etc. The bleaching effect of sulphur dioxide is due to the fact that it (sulphurous acid) can form unstable colorless substances with certain colored substances. This colorless substance easily decomposes and the colored substance returns to its original color, so the straw hat braid bleached with sulfur dioxide turns yellow over time.

SO2 is dissolved in water to form sulfurous acid, which is directly combined with colored organic substances such as slightly acidic magenta solution to form unstable colorless compounds, which are unstable and decompose when heated, so that the colored substances return to their original color.

Sulfur dioxide, dissolved in water to form sulfurous acid, sulfurous acid and magenta combined, forming a complex, so fade.

It reacts with the organic matter in magenta to form a substance that is easily decomposed, and the color can be restored by heating.

It combines with magenta to form an unstable colorless substance.