Can Silver Mirror Reaction Be Used For Metal Silver Plating Urgent answer

No, the silver mirror reaction has high requirements for the smoothness of the surface, and it is difficult for the general material to be evenly covered, so I am worried that this may lead to part of the uncovered, and it is still difficult to escape the fate of oxidation and rust. I've done a few silver mirror reaction experiments, and very few of them have been completely covered. Even if it is completely covered.

If it's uneven, it won't look good.

Suggestion A Apply mineral oil, paint or fired enamel, spray plastic on the surface of iron products, etc. The machine is often coated with mineral oil, etc

b Plating a layer of metal that is not easy to rust by electroplating, hot plating and other methods on the surface of steel, such as zinc, tin, chromium, nickel, etc

It is certain that this is not possible under normal conditions, regardless of the fact that the iron in the coin will replace the silver, even if the silver mirror reacts to the very smooth surface of the metal that can be plated with silver, it will also peel off very quickly. In industry, silver plating on the metal surface is generally electroplating, and the electrolyte is also the electrolyte of the complex. Electrolysis with low concentration of microcurrent is used.

Yes, the coin needs to be surface polished.

No, what is needed for gold plating is a dense film, and the silver mirror reaction is too loose.

It's good to have this idea, and it can be done! But the disadvantage is that it is easy to fade, that is, the silver plating is easy to peel off.

Unrealistically, the silver mirror reaction requires the plated surface to be extremely smooth.

Silver Mirror reactionOccurrence conditions: IncludingAldehyde groupThe substances can undergo the silver mirror reactionIncludes:

1. Formaldehyde, acetaldehyde, glyoxal and other aldehydes.

2. Formic acid and its salts, such as HCOOH, HCOONA and so on.

3. Formate, such as ethyl formate HCOOC2H5, propyl formate HCOOC3H7 and so on.

4. Glucose.

Sugars that contain aldehyde groups in molecules such as maltose.

Description: Fructose.

Although the silver mirror reaction can occur, due to its complex principle, it has been completely deleted after the reform of the textbook in 2002.

Principles of Silver Mirror Reaction Experiments

Silver ammonia complex.

Under alkaline conditions, a redox reaction occurs with aldehydes.

The aldehyde is oxidized into carboxylic acid, and the silver ions of the silver ammonia complex are reduced to metallic silver, which is attached to the inner wall of the test tube to form a silver mirror, so it is called the silver mirror reaction, which can identify the existence of aldehyde groups.

1. The reaction equation of acetaldehyde.

ch3cho+2[ag(nh3)2]oh→ch3coonh4+2ag↓+3nh3+h2o。

2. The reaction equation of formaldehyde: HCO+4[AG(NH3)2]OH=(NH4)2CO3+4AG +6NH3+2H2O.

3. Silver mirror reaction of glucose: C6H12O6+2[Ag(NH3)2]OH=C5H11O5CoonH4+3NH3+2AG+H2O.

The above content refers to Encyclopedia - Silver Mirror Reaction.

1. Under alkaline conditions, the water bath is heated.

2. Requirements for reactants:

Formaldehyde, acetaldehyde.

Glyoxal and other aldehydes contain aldehyde groups (such as various aldehydes, as well as a certain ester of formate, etc.).

Formic acid and its salts, such as HCOOH, HCOONA, etc.

Formate esters, such as ethyl formate HCOOC2H5, propyl formate HCOOC3H7 and so on4Glucose.

Sugars that contain aldehyde groups in molecules such as maltose.

The silver mirror reaction is a chemical reaction in which the solution of silver (AG) compounds is reduced to metallic silver, which is called the silver mirror reaction because the generated metallic silver adheres to the inner wall of the container and is as bright as a mirror. A common silver mirror reaction is a silver-ammonia complex.

Ammonia-silver complexes, also known as Toren's reagents) are reduced to silver by aldehydes, and aldehydes are oxidized to the corresponding carboxylate ions, although in addition to this, certain silver compounds (such as silver nitrate.

It can also be reduced by reducing agents (such as hydrazine) to produce a silver mirror.

Under alkaline conditions, the water bath is heated.

Silver Mirror reactionReactant requirements:

1. Formaldehyde and acetaldehyde.

Glyoxal and other aldehydes contain aldehyde groups.

For example, various aldehydes, as well as a certain ester of formate, etc.).

2. Formic acid and its salts, such as HCOOH, HCOONA, etc.

3. Formate esters, such as ethyl formate.

HCOOC2H5, propyl formate HCOOC3H7, etc.

4. Glucose.

Sugars that contain aldehyde groups in molecules such as maltose.

First, the reactants are aldehydes and silver ammonia solutions.

The condition is water bath heating.

Note, the tube in which the silver mirror is prepared must be very clean to produce a shiny silver mirror.

You can take a look at the silver mirror I made.

Conditions: Organic matter containing aldehyde groups and silver ammonia solution are heated in a water bath. The silver produced by reduction adheres to the wall of the test tube to form a silver mirror, and this reaction is called the silver mirror reaction.

For example: acetaldehyde reacts with silver ammonia solution CH3CHO+2AG(NH3)2OH=CH3CoonH4+2AG+3NH3+H2O

Silver Mirror reactionThe conditions are: alkaline conditions, water bath heating. Requirements for reactants of the silver mirror reaction:

1. Formaldehyde and acetaldehyde.

Glyoxal and other aldehydes contain aldehyde groups.

For example, various aldehydes, as well as a certain ester of formate, etc.).

2. Formic acid and its salts, such as HCOOH, HCOONA, etc.

3. Formate esters, such as ethyl formate.

HCOOC2H5, propyl formate HCOOC3H7, etc.

4. Glucose.

Sugars that contain aldehyde groups in molecules such as maltose.

Notes:

The tubes should be clean (this is one of the keys to the success or failure of the experiment). Otherwise, Yuyubi only gets a black loose silver precipitate, and there is no silver mirror produced or the silver mirror produced is not bright.

After the solution is mixed, the oscillation should be sufficient (this is the key to the success or failure of the experiment). When adding the last solution, the shaking should be fast, otherwise dark spots will appear or a silver mirror will be uneven.

Add ammonia.

Be in moderation (this is the third key to the success or failure of the experiment). The concentration of ammonia should not be too large, and the speed of dropping ammonia must be slow, otherwise ammonia is easy to be excessive. Excessive ammonia celery water will reduce the sensitivity of the reagent, and it is easy to generate ** substances.

What is the process of the silver mirror reaction?

Add 1 ml of 2% silver nitrate solution to a clean test tube, then add sodium hydroxide aqueous solution, and then shake the test tube while the white precipitate can be seen. Then drop 2% dilute ammonia water drop by drop until the initial precipitate is just dissolved, and the resulting solution is called silver ammonia solution. Silver mirror reaction of acetaldehyde:

Add 3 drops of acetaldehyde to the silver ammonia solution, shake and warm the test tube in hot water. Soon you can see that a layer of metallic silver is attached to the inner wall of the test tube, which is as bright as a mirror. Silver mirror reaction of glucose:

Add a dropper of glucose solution to the silver ammonia solution, shake and warm the tube in hot water. Soon you can see that a layer of metallic silver is attached to the inner wall of the test tube, which is as bright as a mirror.

The conditions for the silver mirror reaction are described below:

Silver mirror reaction conditions: All substances containing aldehyde groups can undergo silver mirror reaction, including:

1. Formaldehyde, acetaldehyde, glyoxal and other aldehydes.

2. Formalic acid and its salts, such as HCOOH, HCOONA and so on.

3. Formate, such as ethyl formate HCOOC2H5, propyl butanyl formate HCOOC3H7 and so on.

4. Sugars containing aldehyde groups in glucose, maltose and other molecules.

Note: Although fructose can have a silver mirror reaction, it has been completely deleted after the reform of the textbook in 2002 due to its complex principle.

Principles of Silver Mirror Reaction Experiments

Under alkaline conditions, the silver ammonia complex undergoes a redox reaction with aldehydes to oxidize the aldehyde into carboxylic acids, and the silver ions of the silver ammonia complex are reduced to metallic silver, which is attached to the inner wall of the test tube and becomes a silver mirror, so it is called the silver mirror reaction, which can identify the existence of aldehyde groups.

1. The reaction equation of acetaldehyde: CH3CHO+2[AG(NH3)2]OH CH3COONH4+2AG +3NH3+H2O.

2. The reaction equation of formaldehyde: HCO+4[AG(NH3)2]OH=(NH4)2CO3+4AG +6NH3+2H2O.

3. Silver mirror reaction of glucose: C6H12O6+2[Ag(NH3)2]OH=C5H11O5CoonH4+3NH3+2AG+H2O.