О производстве спичек

The Ways of extinguish
There is a picture of the person who is extinguishing burning oil in pot, models of the fire-extinguisher and its construction and pictures of ways to use on the stage. There is a table on the stage. There is a bottle with 100 ml benzene, crystal, a glass cover for its covering, a glass of water, a bottle with 200 ml kerosene, a stick by size 1 m wound with the rag on the end, 1 m tarpaulin, iron tray with sand, a rag,
4-5 cm candle, empty glass, instrument for taking the carbon dioxide (the marble stone and the dishes with colors acid) on the table. Akbar and Rahmat enter to the stage.. Seeing the instruments on table Akbar, surprised and wants to see them. In this time appear Saodat and Hafiza in the stage
.
Saodat: Akbarali what do you want?
Akbar (showing on table): seeing these belongings I wondered.
Saodat: Here is nothing amazingly.
Hafiza: This is instruments and reagents for chemical experience.
Rahmat: What experiences possible to do with this material.
Saodat: With the help of these instruments we can show the experiences of the extinguishing.
Akbar (dare): You don’t know extinguishing!
Hafiza : do you know?
Akbar: certainly (taking a match from his pocket Akbar fired the stick. Looking at Hafiza says) look how I will (He blow and extinguished, all laughed)
Hafiza. (Looking at Saodat) did you see him blowing on it?
Rahmat.It is Possible to extinguish not blowing (Rahmat fired the match again and extinguished it by shaking it) Did you see I extinguished not blowing on it Saodat: it is easy to extinguish fired match by blowing or shaking, but how will you extinguish a fire, when you heat the oil and it will take a fire, if you can not extinguish it by blowing or shaking! What will you do?
Akbar: You do not know! Most suitable method is pouring a pail of water.
Rahmat: you must pour the water onto the pot and all questions is solved.
Hafiza: No, in this way it is impossible to extinguish the fire. The Burning oil, kerosene, benzene and like liquids do not extinguish by water, but on the contrary blaze better.
Saodat: let`s see it on example. (Saodat has installed crystal on tray with sand, she infuseda little benzene in it. She puts the bottle of benzene far from tray with sand and burned benzene in curs. Then she added a little water. The Fire did not stop.She covered the fire with crystallization glass. The Fire extinguished.
Hafiza: See? At accompaniment of water fire not extinguished
Saodat(showing the picture on the wall): Most main method is to lock the pot with its cover ,which is wound with towel , and fire extinguishes.
Rahmat: Why the pot will extinguish. If we close it with its cover?
Saodat: Reason of extinguishing fire, by closing a pot with its cover, the air (the oxygen) can not enter there. If the air can not enter the fire extinguishes
Hafiza: Understandable?
Rahmat: we understand.
Akbar:I have seen at first such way of the redemption of the fire.
Hafiza: If some person` s cloth blazes, how do you help him?
Akbar: May I say?
Saodat: Let's listen.
Yuldash: If there would be a pool near by him I will say "Throw yourself into the pool or pour a pail of water over him.
Saodat: This is much dangerously and wrong. You know if we pour a hot water into the cool glass it will break so I f we pour a water to the skin it will blister.
Hafiza: Often persons whose cloth is burning begin to hurl and run from scare.
Saodat: It is Correct. This is also prohibited. Because if a man, whose cloth is burning, runs, the oxygen will full there and the fire will increase. So, it is necessary to stop running (showing the picture on the wall), after he must be wound by, towel quickly, in this case the air can not enter there thus the fire will extinguishe . Then, it is necessary quickly to undress, take him to hospital
Hafiza: if you want I will show this experience.
Rahmat: Want, but whom we will burn?
Hafiza (smiling): nobody. We burns this stick and shall make an experiment
(Hafiza takes one meter stick, prepared beforehand, which is wrapped with a rag halfly and flooded it in kerosene, and holds for the other side of the stick, and burned the rag, the stick begins to blaze slowly. Waves the stick to each sides and the fire increased. Then Saodat wrapped with tarpaulin the burning part. The Fire redeems.)
Hafiza: did you see, how extinguish?
Akbar:We have seen and learnt. Thank you!
Rahmat: If fires the part of building, or heaps of clover, how we must extinguish Saodat: Can you Akbarali tell this?
Akbar: I can tell, but you will say "wrong" thus it’s better tell yourself..
Saodat: In this case use sand and land. You must scatter sand or land on burning place.
Hafiza: But it is possible to use if there is fire-extinguisher.
Rahmat: What is the fire-extinguisher?
Saodat: Have you ever seen in movie, theatre, buildings, even in basket of the cars hung the red cylindrical balloon?
Rahmat: Yes I have seen it in the corner common-room of the movie-theatre.
Akbar: I have seen it at the entering to school.
Saodat: Thank you, this and there is fire-extinguisher
Akbar: Why do we use it? (Saodat using scheme of the fire-extinguisher hang on wall ,has explained the method of the using it.)
Hafiza: we shall show you the experience using the fire-extinguisher. (Hafiza explained the model of the fire-extinguisher comparable to scheme of the fire-extinguisher hang on wall. She wetted the rag; the kerosene put on tray with sand and burns it. Then she used a model of the fire-extinguisher and redeemed the fire Akbar: You are also redeemed the fire by pouring water.
Hafiza: The water has not redeemed the fire, but the material which was formed in process of the reactions in particular carbon dioxide SO2 is redeemed the fire. This gas is heavy 1,5 from the air ,thus he covers the fire, the air goes out there.
2NaHCO3 + H2SO4 = Na2SO4 + 2H2O + 2CO2
Because of lack the air, fire goes out.
Saodat: This is possible to show with the help other experience. Do you want to see it?
Rahmat: yes we want. (Saodat lights the candle and installs inside glass, candle continues to blaze. Then begins to direct the formation carbonate gas in the glass,wit the instrument kipp stop burning.
Saodat: So, carbon dioxide displaces the air, and extinguishes the fire.
Akbar: Thank you!
Rahmat: These experiences were a big lesson for us become.
Saodat: There are many easy to redeem the fire. Be careful with fire, if will unexpectedly appear the fire do not hurry and try to extinguish it.
Akbar: Thank you for these advices (All leave with scene).