Can an evaporation dish be heated directly? Can the evaporation dish be heated directly?

The evaporation dish can be heated directly.

The evaporation dish is a vessel used to evaporate concentrated solutions or burn solids, with a large mouth and a shallow bottom, and there are two types of round bottom and flat bottom with handle. An evaporation dish is a vessel that can be used to evaporate a concentrated solution, which can be heated directly on a tripod or indirectly with an asbestos net, water bath, etc.

Since the evaporation dish is fired from clay, although it can be heated directly with an alcohol lamp, it usually needs to be preheated evenly first to prevent sudden thermal expansion and contraction and cracking. Erlenmeyer flasks, also known as triangular flasks, Ehrlich flasks, Erlenmeyer flasks and Oromeer flasks, were invented by the German chemist Richard Örenmaier in 1861.

The crucible, evaporation dish, and test tube can be heated directly, and the contact area with the flame is small, but the test tube must also be preheated first when heating, otherwise it is easy to explode due to uneven heating;

2. The contact area between the beaker and the flask and the flame is large, and it is easy to explode if it is heated unevenly. Therefore, it is necessary to use asbestos netting to make the heating even.

3. Graduated cylinders should not be heated.

The evaporation dish is fired from clay and can be heated directly with an alcohol lamp, but it usually needs to be preheated evenly first to prevent sudden thermal expansion and contraction and cracking. I think you must have not warmed it up first, so it cracked.

Crucibles, evaporation dishes, and test tubes can all be heated directly; Beakers, distillation flasks can be heated indirectly; Graduated cylinders, etc., should not be heated.

Yes. Just like when the brine evaporates, the brine is placed on the evaporation dish and then heated directly.

The evaporation dish can be heated directly.

Choose a beaker to have an asbestos mesh and reheat.

The evaporation dish can be heated directly.

The material is ceramic.

The evaporation dish is heated...

The evaporation dish can be heated directly. Evaporation dishes can be placed in asbestos mesh.

Use an alcohol lamp on it.

Or the gas lamp directly heats and evaporates, and then transfers it to a water bath to heat and evaporate when the solution becomes thicker. It should be noted that the evaporation dish should not be quenched after heating to prevent rupture.

An evaporation dish is a vessel that can be used to evaporate a concentrated solution. It can be heated directly on the tripod, or it can be heated indirectly by asbestos nets, water baths, etc., and when heated, it can be stirred with a glass rod.

Specifications: Commonly used specifications are centimeters and so on according to the size of the caliber. Different specifications can be selected according to different applications.

Evaporation dishes are porcelain products, and can also be made of glass, quartz, platinum or copper. Different materials and different corrosion resistance should be appropriately selected according to the properties of solutions and solids. It has good purity for the stability of acid and alkali.

It can withstand high temperatures, but should not be quenched.

Can be heated directly on a tripod. An evaporation dish is a vessel that can be used to evaporate a concentrated solution and can be heated directly on a tripod. It can also be heated indirectly with asbestos nets, water baths, etc., and when heated, it can be stirred with glass rods.

Commonly used specifications are centimeters and so on according to the size of the caliber.

Notes:1) It can withstand high temperature, and cannot be quenched after heating to prevent breakage.

2) The evaporation dish should be taken and placed with crucible pliers, and fixed with a tripod or iron frame table when heating.

3) When the amount of liquid is large, it can be heated directly, and the small amount or viscous liquid should be heated by asbestos net or placed on the mud triangle.

4) When heating the evaporation dish, stir continuously with a glass rod to prevent the liquid from splashing around when it is partially heated.

Summary. Therefore, it is only a special case, and this method is not usually used for heating.

Hello, glad your question made you wait a long time. No. Chemical instruments have strict standards for use, evaporation dishes are generally used to evaporate solutions, most of the evaporation with lead reed dishes are made of glass or ceramic, and the exacerbation is not suitable for solid heating, which may cause the evaporation dish to break.

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But some teachers say that the evaporation dish can heat the solid with water, so that the water evaporates and gets a dry solid, what is the situation?

I haven't heard of this method of operation, just for convenience, but it's not formal.

Therefore, it is only a special case, and this method is not usually used for heating.

One cold and one hot, glass evaporation dish.

Not being able to withstand the temperature difference will not only burn the test bench, the temperature will be very high after heating, and the test bench will be cold, and the evaporation dish may also be damaged by exploding. Not only can the instrument be damaged, but the evaporation dish used for direct heating can also be dangerous.

Although the evaporation dish is resistant to high heat, it will explode when heated when it is cold, so be careful not to let the heated evaporation dish touch the cold water, and put it aside to restore it to room temperature.

Placing the heated evaporation dish directly on the bench may have the effect of lead in the sails.

The evaporation dish used for direct connection heating, the temperature is very high after heating, and the test bench is cold, one cold and one hot, the glass evaporation dish can not withstand the temperature difference will not only burn the test bench, but also the evaporation dish may be damaged.

The evaporation dish can be heated directly.

An evaporation dish is a container used to evaporate a concentrated solution. The evaporation dish can be heated directly by a tripod, or indirectly by asbestos nets, water baths, etc., and can be stirred with a glass rod during the heating process.

The commonly used evaporation dish caliber and size are centimeters, etc. Depending on the experimental application, the user can choose different specifications.

Evaporation dishes are usually made of porcelain but can also be made of materials such as glass, quartz, platinum or copper. It should be noted that the materials that make up the evaporation dish are different, and their corrosion resistance is different, and the closed vertical should be selected according to the different properties of the solution and the solid.

The evaporation dish has good stability to acids and alkalis. It can withstand high temperatures, but it cannot suddenly cool down and prevent breakage.

Pay attention to the use of evaporation dishes

1. The evaporation dish should be picked and placed with crucible pliers, and should be fixed with a tripod or iron frame when heating.

2. When heating the evaporation dish, keep stirring with a glass rod to prevent the liquid from being heated unevenly.

3. The heated evaporation dish should not be placed directly on the table, but should be placed on the asbestos net to avoid scalding the table.

4. After a large amount of solid precipitation is removed, the alcohol lamp should be extinguished and the remaining water should be evaporated with waste heat.