In daily life, what items can replace which instrument in a chemical experiment?

Two chopsticks – crucible pliers.

A chopstick – a glass stick.

Spoon – Medicine spoon.

Plastic straws – catheters.

Bowl – evaporation dish.

Cup – Beaker.

Plastic bottles – gas collection cylinders.

Candles – alcohol lamps.

Categories: Science & Engineering.

Problem description: There are chemical instruments with test tubes, beakers, funnels, round-bottom flasks and gas collectors, now give an example, what are the items at home that can replace these 5 chemical instruments for experiments? (The more examples you can give, the better).

Analysis: The test tube is about 5w fluorescent infiltration tube, and the mercury powder is cleaned when used.

Beaker - a 500ml bottle for babies with a scale on it.

Funnel - Knocking off the bottom of the bottle is a big crack.

Far bottom burn Biliang bottle - 200W large tungsten bulb, but don't pack it too heavy.

Gas collection cylinder - I don't know which one to say, but this thing is not easy to modify, try it with a drink bottle, the gas is not easy to reflect.

As an indispensable experimental place for medical, engineering, physical chemistry and other scientific research experiments, the laboratory stores a variety of experimental equipment. Experimental platform, as the most common and necessary equipment in the laboratory, the experimental platform is a variety of experimental platforms, which need to have corrosion resistance, acid and alkali resistance, easy cleaning and other properties, and the common experimental platforms are divided into PP experimental platforms, all-steel experimental platforms, and steel-wood experimental platforms, and their sizes can be selected according to the size required by the laboratory.

<> fume hood, the fume hood is also an indispensable equipment for the laboratory, which can remove harmful gases in the laboratory in a timely and effective manner, ensure the health and safety of the experimenters, and also provide a good ventilation environment for the laboratory. Common fume hoods include stainless steel fume hoods, all-steel fume hoods, and PP fume hoods, which can be selected according to your own laboratory type. Explosion-proof cabinets are mainly used to prevent and avoid fires caused by flammable and explosive gases in the laboratory.

It acts as a safety cabinet for the laboratory, which can not only prevent the internal gas from being affected by the external **, but also prevent the accidental ** of the internal gas from causing harm to the laboratory. By the way, the purchase of explosion-proof cabinets needs to pass the testing of the national quality and safety system, and the explosion-proof fire test must also pass the relevant national testing to have its safety certificate.

Medicine cabinet, also known as reagent cabinet freezer, mainly plays the role of hazardous chemicals, drug storage, common materials are steel medicine cabinet, PP medicine cabinet, cabinet body using epoxy resin spraying process, environmental protection and durability. The storage of medicines should be carried out in strict accordance with the storage rules. Gas cylinder cabinets, also known as hazardous gas storage cabinets, mainly have single bottles, double bottles, three bottles and other specifications, which are used for the storage of dangerous gases in the laboratory.

Nowadays, the gas cylinder cabinets are equipped with intelligent alarms, which are very intelligent.

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Beakers, glass rods, evaporation dishes, test tubes, microscopes, these equipment are especially necessary when doing scientific experiments, so that scientific experiments can occur phenomena and draw conclusions.

Evaporation dishes, steel shelves, glasses, measuring cylinders, heat shields, glass rods, etc. are all indispensable and will definitely be used.

What is needed is PP experimental platform, all-steel experimental platform, steel-wood experimental platform, glass steel, and heat insulation net.

The medicine spoon is used to distinguish medicines, and a small spoon is used to take MSG when stir-frying, so you can use a spoon instead of a small spoon; Alcohol lamps can be heated, and electric heaters are also used for heating, so alcohol lamps can be used instead of electric heaters; A beaker is a glass instrument that can be used to hold medicines or reaction vessels Our glasses are also glass products, similar in shape and texture to beakers, so glasses can be used instead of beakers; The syringe has a scale, which can measure the volume of the liquid, so it can replace the graduated cylinder; The syringe can be used to suck up or drop liquid, which is the same as the purpose of the dropper, so it can be used instead of a dropper; The syringe can control the amount of liquid added, and there is a switch on the separating funnel, which can also control the addition and addition progress of liquid drugs, so it can replace the dispensing funnel.

1. Add vinegar to the kettle to remove the scale on the inner wall of the thermos.

Experimental principle: The main components of scale are calcium carbonate and magnesium hydroxide, which can react with acetic acid to form solubles, so they can be removed.

2. The egg shell is added to the vinegar, and the egg shell can be dissolved in acetic acid.

Experimental principle: The main component of egg shell is calcium carbonate, which can react with acetic acid to form soluble.

3. Add iodine to the potatoes to prove that the potatoes contain starch.

Experimental principle: starch turns blue when exposed to iodine.

4. Irradiate the tap water with starch with a beam of light to prove that the starch solution has the Tyndall phenomenon.

Experimental principle: starch solution is colloidal, with a beam of light through the colloid, you will see a bright "path", because the colloidal particles will scatter the light, so that the light wave deviates from the original direction and disperses and spreads, and the solution will reflect the light, so it can not be seen.

5. Add iodine wine to the rice soup to prove that the rice soup contains starch.

Test principle: Rice soup contains starch, and the starch turns blue when exposed to iodine.

Chemistry "Home Experiment" is the use of household daily necessities for chemistry learning and ** activities, based on your experience, you think the following home experiments can not be successful ( aSoda ash is tested for CO32-BUse a cold dish to place above the candle flame to make carbon black c

Use vinegar to remove limescale d. from the gallbladder of the thermosUse salt water to remove rust from the surface of the kitchen knife.

Instruments commonly used in chemistry laboratories are:

1. Tray balance: It is an instrument used to roughly weigh the mass of a substance, and each balance is equipped with a box of French codes. There are two types of load 100 g (inductance g) and 200 g (inductance g) commonly used in middle school laboratories.

2. Funnel: It is a cylindrical object, which is used to inject liquid and fine powdery objects into a container with a smaller inlet. The finer tubular part at the nozzle of the funnel can be of different lengths.

Funnels are usually made of stainless steel or plastic, but paper funnels are sometimes used for substances that are difficult to clean thoroughly, such as engine oil.

3. The jar is a glass container used to hold solid reagents, there are two kinds of transparent and brown, and the brown bottle is used to hold reagents (such as silver nitrate) that need to be stored in the dark. Jars are generally used to store reagents, and the inside of the mouth is frosted for use with the stopper.

4. Asbestos mesh is a barbed wire mesh on a tripod mounted on an alcohol lamp when heating liquids. It is made of two pieces of barbed wire sandwiched between a sheet of cotton cloth soaked in asbestos water and then dried.

5. Iron frame: used to fix and support various instruments, and the iron ring can be used instead of the funnel frame. It is generally used for filtration, heating, titration and other experimental operations. It is one of the most widely used instruments in physical and chemical experiments, and is often used in conjunction with alcohol lamps.

Basic instruments: test tubes, beakers, flasks (round bottom and flat bottom).

Measuring instruments: graduated cylinders, thermometers, volumetric flasks.

Heating instruments: alcohol lamp, alcohol blowtorch, wide flame lamp.

Others: Glue tip droppers, glass rods, funnels (normal, long-necked, and dispensing) are basically all there is.

The container that should be used for the evaporation and crystallization of the solution is the evaporation dish

The glass instrument that can be used to produce both hydrogen and carbon dioxide is the Erlenmeyer flask

With the above instruments to prepare a certain mass fraction of sodium chloride solution, the glass instrument that is also missing is the beaker glass rod

The syringe has a scale, which can measure the volume of the liquid, so it can replace the graduated cylinder; The syringe can be used to suck or drop liquid, which has the same purpose as the rubber tip dropper, so it can replace the rubber tip dropper; The syringe can control the amount of liquid added, and there is a switch on the separating funnel, which can also control the addition and addition progress of liquid drugs, so it can replace the dispensing funnel.

So the answer is: rubber tip dropper