A) All the laboratories of inorgani

A) All the laboratories of inorganic chemistry are almost alike. These are large
rooms where both students and research-workers carry out their experimental work.
Modern laboratories of inorganic as well as organic and analytical chemistry are
provided with gas and running water. Every laboratory is to be provided with a
ventilating hood for the escape of both harmful and unpleasant vapours and odours.
Every laboratory has to be lit up very well.
There are many laboratory benches with a great number of drawers in every
laboratory. Different apparatus devices as well as materials are to be kept in them.
Besides we can see many shelves and cases for containers with chemicals.
On every laboratory bench one can see test-tubes, flasks, beakers, funnels,
evaporating
dishes, weighing bottles. All this glassware should be kept in good order.
Various burners serve for producing flames. Bunsen burner is to be mentioned
among them. Different crucibles are to be employed when heating of solution and
igniting of materials are to be carried out. Crucibles are usually made of quartz,
porcelain and iron. In addition to these crucibles, there are platinum crucibles in some
laboratories, but they are used very seldom.
B) Every laboratory should be equipped with different kinds of apparatus. Everything
in the laboratory is to have its definite place.
Experiments in the Laboratory Many experiments can be carried out in the laboratory
of inorganic chemistry. Thus, if we want to obtain hydrogen chloride (HCL) which is
often referred to as a hydrochloric acid gas, it is necessary to pour some sulphuric
acid through a tube over the crystal of sodium chloride, in a flask. The fiask is to be
heated. On warming the fiask, the hydrogen chloride is expelled as a colourless gas
with a suffocating odour. It produces heavy clouds of white fumes when it comes in
contact with the moist air of the room.
It is soluble and it cannot be collected over water as are oxygen and hydrogen. It is
much heavier than the air and may be passed through a glass tube to the bottle. If we
dissolve some of the gas in water, the solution has a sour taste, reddens blue litmus,
reacts with zinc, etc.: it is hydrochloric acid. When all the sodium chloride originally
present in the flask has been transformed, the reaction is complete. The flask then
contains a salt called sodium acid sulphate (NaHSO4) together, with unchanged
excess of sulphuric acid.
Nitric acid may be prepared by the reaction of concentrated sulphuric acid with
sodium nitrate. In the laboratory method, a mixture of sodium nitrate and
concentrated sulphuric acid is heated in a glass retort. Nitric acid is boiled out of the
mixture and is condensed: NaNO3 + H2SO4 = HNO3+ NaHSO4
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Результаты (русский) 1:

A) все лаборатории неорганической химии почти так. Эти большиеномера, где студентов и исследователей проводить их экспериментальной работы.Современные лаборатории неорганических а также органической и аналитической химииобеспечены газом и проточной водой. Каждая лаборатория осуществляется свентиляционные вытяжки для избежания неприятных и вредных паров и запахов.Каждая лаборатория должна быть зажжен очень хорошо.Есть много лабораторных скамейки с большим количеством ящиков в каждомЛаборатория. Различные аппараты устройства, а также материалы должны храниться в них.Кроме того, мы видим много полки и шкафы для контейнеров с химическими веществами.На каждой лаборатории скамейке, один можно увидеть тест трубки, колбы, мензурки, воронки,испарительныеПосуда, весом бутылки. Все это посуда должна храниться в хорошем состоянии.Различные горелки служат для производства пламени. Горелка Бунзена, следует отметитьсреди них. Различные тигли должны использоваться при нагревании решения иВоспламенение материалов должны осуществляться. Тигли обычно сделаны из кварца,фарфор и железо. В дополнение к этим тиглях в некоторых есть платиновые тиглилаборатории, но они используются очень редко.B) каждой лаборатории должны быть оснащены различными видами аппаратуры. Всев лаборатории является определенное место.Эксперименты в лаборатории многие эксперименты могут проводиться в лабораторииof inorganic chemistry. Thus, if we want to obtain hydrogen chloride (HCL) which isoften referred to as a hydrochloric acid gas, it is necessary to pour some sulphuricacid through a tube over the crystal of sodium chloride, in a flask. The fiask is to beheated. On warming the fiask, the hydrogen chloride is expelled as a colourless gaswith a suffocating odour. It produces heavy clouds of white fumes when it comes incontact with the moist air of the room.It is soluble and it cannot be collected over water as are oxygen and hydrogen. It ismuch heavier than the air and may be passed through a glass tube to the bottle. If wedissolve some of the gas in water, the solution has a sour taste, reddens blue litmus,reacts with zinc, etc.: it is hydrochloric acid. When all the sodium chloride originallypresent in the flask has been transformed, the reaction is complete. The flask thencontains a salt called sodium acid sulphate (NaHSO4) together, with unchangedexcess of sulphuric acid.Nitric acid may be prepared by the reaction of concentrated sulphuric acid withsodium nitrate. In the laboratory method, a mixture of sodium nitrate andconcentrated sulphuric acid is heated in a glass retort. Nitric acid is boiled out of themixture and is condensed: NaNO3 + H2SO4 = HNO3+ NaHSO420