Why is the water in the dehumidifier bag frozen?

Freezing is due to the production of calcium dichloride crystals.

Because the particles inside the dehumidification bag are anhydrous calcium chloride that is easily deliquescent.

Anhydrous calcium chloride absorbs moisture from the air and dissolves in it to form a saturated solution. In certain environments, the temperature will drop, resulting in the formation of a supersaturated solution, and calcium dichloride crystals will precipitate out in the supersaturated solution, so the so-called "water in the dehumidification bag will freeze".

Water reacts with calcium chloride, which will release a large amount of heat, which is a physical reaction.

Colorless cubic crystals, white or off-white, granular, honeycomb block, spherical, irregular granular, powdery. Slightly toxic, odorless, slightly bitter in taste. It is extremely hygroscopic and exposed to air.

Easy to deliquescent. It is easily soluble in water and at the same time releases a large amount of heat (the dissolution enthalpy of calcium chloride is, and its aqueous solution is slightly acidic.

Therefore, anhydrous calcium chloride must be sealed and stored in a container. Calcium chloride and its hydrates.

and solutions have important applications in many aspects such as food manufacturing, building materials, medicine and biology.

Pure calcium can be obtained after calcium chloride electrolysis:

cacl2 →ca(s) +cl2(g)

<> this is not freezing, the crystallization of the old housekeeper dehumidification bag is a normal phenomenon of calcium chloride after water absorption (crystal CaCl2·H2O is formed after water absorption), and this reaction generally occurs at "different temperatures" to form crystal water compounds of different sizes and shapes, and will automatically dissolve in water after water absorption.

The dehumidification bag of the old housekeeper is agglomerated after moisture absorption because of the normal phenomenon of calcium chloride after moisture absorption (water absorption to form crystalline CAC12·H20), generally this reaction can form crystalline water compounds of different sizes and shapes at "different temperatures", which is a normal phenomenon (can be queried) and does not affect the normal use of the dehumidification bag.

How does your dehumidification bag work? The dehumidifier bag you just bought is powder, right?

It's possible that what you're seeing isn't ice, but crystals formed by some kind of dehumidifier (such as calcium chloride) and crystallized water, a bit like single crystal rock sugar (of course, there is no crystal water in rock sugar).

The end of the journey to Zheng Bing is because of the production of calcium dichloride crystals. The town sellsThe principle of crystallization of the dehumidification bag is that calcium dichloride crystals are produced during the reaction, and the particles in the dehumidification bag are easily deliquescentAnhydrous calcium chlorideWater reacts with calcium chloride, which will release a large amount of heat, which is a physical reaction.

Anhydrous calcium chloride absorbs moisture from the air and dissolves in it to form a saturated solution; However, at a specific ambient temperature, such as a drop in temperature in some environments, it will lead to the formation of a supersaturated solution, in which calcium dichloride crystals will be precipitated, which is the phenomenon of "water crystallization in the dehumidification bag".

How to use: 1. Tear open the bag along the gap of the bag body, take out the moisture-absorbing bag, and the moisture-absorbing bag will automatically start to absorb moisture.

2. Hang the moisture-absorbing bag in the required space, at least 5-10 cm between clothes and other items and the moisture-absorbing bag, so that the moisture-absorbing bag is in complete contact with the air, and the lower part of the moisture-absorbing bag is a water container to collect the water absorbed by the upper part of the moisture-absorbing agent.

3. When the moisture reaches the position of the replacement prompt or the white crystal moisture absorber is completely dissolved, keep the bag upright and remove it completely and put it into the trash can.

Because the particles in the dehumidification bag are anhydrous calcium chloride that is easily deliquescent, anhydrous calcium chloride will absorb moisture in the air and dissolve in it to form a saturated solution. In certain environments, the temperature will drop, resulting in the formation of a supersaturated solution, and calcium dichloride crystals will precipitate out in the supersaturated solution, so the so-called "water in the dehumidification bag will freeze".

Calcium chloride is a salt formed by chloride ions with calcium ions. Anhydrous calcium chloride has strong hygroscopicity and is used as a desiccant for various substances. It is a widely used chemical agent.

How does your dehumidification bag work? The dehumidifier bag you just bought is powder, right?

It's possible that what you're seeing isn't ice, but crystals formed by some kind of dehumidifier (such as calcium chloride) and crystallized water, a bit like single crystal rock sugar (of course, there is no crystal water in rock sugar).

The particles in the dehumidification bag should be anhydrous calcium chloride, anhydrous chlorinated calcium absorbs water from the air and dissolves in it to form a saturated solution, at a certain ambient temperature, such as some temperature drop environment, will cause the solution to be too saturated, calcium chloride crystals precipitate in the solution, this is the water crystals we fancy the draft.

Can I still use the dehumidification bag if there is water crystallization in it?

Many people will worry about whether they can still be used if there are crystals in the dehumidification bag? In fact, it will not affect the use, this crystal has the same properties as calcium chloride, and will not affect the use.

Like calcium chloride, these crystals are highly hygroscopic and soluble in water, and they will continue to react with water at the water storage site to deliquescent.

The crystals in the dehumidification bag will not explode if they all become water, but the premise is that there is no problem with the dehumidification bag itself.

The principle of dehumidification bag crystallization is because calcium dichloride crystals are produced during the reaction process, and the particles in the dehumidification bag are anhydrous calcium chloride that is easy to deliquescent, and the water will react with calcium chloride, which will release a large amount of heat, which is a physical reaction. Anhydrous calcium chloride absorbs moisture from the air and dissolves in it to form a saturated solution;

At a specific ambient temperature, such as a drop in temperature in some environments, it will lead to the formation of a supersaturated solution, in which calcium dichloride crystals will be precipitated, which is the phenomenon of water crystallization in the so-called dehumidification bag.

Instead of freezing, the underside of the dehumidification bag is crystallized, which is due to the production of calcium dichloride crystals.

If the temperature drops, it will cause it to form a supersaturated solution, in which calcium dichloride crystals will precipitate.

The particles in the dehumidification bag are anhydrous calcium chloride that is easy to deliquescent, and the water will react with calcium chloride, which will release a large amount of heat, which is a physical reaction. Anhydrous calcium chloride absorbs moisture from the air and dissolves in it to form a saturated solution; However, at a specific ambient temperature, the phenomenon of "water crystallization in the dehumidification bag" will occur.

The crystallization is the precipitated calcium dichloride crystal, which is a cubic crystal, colorless, white or off-white, and has granular, honeycomb block, spherical, irregular granular, powder and other shapes. Slightly toxic, odorless, slightly bitter in taste.