Translations by Lie Ex

The water jet pump has two entry pipes and one exit and consists in principle of two pipes one inside the other. At the water entry a water jet shoots under full pressure out of a nozzle into a slightly larger pipe. Thereby the water jet carries away air or fluid from the second entry. <br> This is caused by the negative pressure in a drifting fluid. Thus it is an application of the hydrodynamic paradox. This says that objects close to drifting fluids are aspirated instead of being pushed away.

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In a test tube small reactions or experiements are performed. There are many different types of tubes. For example some have connectors, some are etched for measurements, some are hardened for durability.

A rotary evaporator consists of a round flask in a bath of hot water that is designed to evaporate solvents. The flask is rotated and the solvent collects under a vacuum onto a condenser and drips into a condensate collecting flask. In this way solutions can be concentrated or purified. By attaching a vacuum pump, the air pressure and therefore the boiling point of the fluid can be decreased.

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A round-bottomed flask is used for a lot of reactions. Some can be connected to other items, as the frosting on the neck shows. With cork rings they can be placed on a table.

Test tube fastener

Round-bottomed Flask

A pipette bulb is used to fill pipettes. It produces a negative pressure which makes the fluid go into the pipette. If one lets air back into the ball the fluid will run out of the pipette.

There are reactions which need to be kept free of water. To make this possible one uses a drying tube, which contains a hygroscopic chemical to absorb water in the atmosphere.

The magnetic moment of an object is a vector relating the aligning torque in a magnetic field experienced by the object to the field vector itself. It's measured in units of the nuclear magneton &#956;[sub]n[/sub]=(5.0507866 &#177; 0.0000017) 10[sup]-27[/sup] JT[sup]-1[/sup]

Covalent radius in chemistry corresponds to half of the distance between two identical atomic nuclei, bound by a covalent bond.

These bottles are used for many purposes. In most laboratories they are usually filled with water, salt, acid or other commonly used fluids. They make it easy to apply the fluid if you do not need to measure a precise amount.

Round-bottomed Flask

A separating funnel can be used to separate a mixture of fluids by differing density. A valve at the bottom allows you to drain the more dense fluid for transfer to another container.

A dropping funnel can be used to drop precise amounts of fluid. You can control the dropping speed with a valve.

A separating funnel can be used to separate a mixture of fluids by differing density. A valve at the bottom allows you to drain the more dense fluid for transfer to another container.

A dehydrator is a laboratory apparatus which is often made of glass and serves to dry chemical matters, that is, to remove water or liquid from a sample. In principle it is a glass bowl with cap which has a planar grinding so that the bowl is air tight closeable. The dehydrator's lower part is ordinarily filled with a drying agent e.g. calcium chloride, silica gel, phosphoric anhydride or sulphuric acid. The sample to be dried is placed on a diaphanous cartridge of plastic or ceramics above the drying agent. The drying agent is hygroscopic, which means that it dehumidifies its environment by absorbing water vapor. The dry atmosphere then takes up water from the sample to be dried.

This rack comes in handy when you want to test many small amounts of chemicals in a row, or if you want to dry test tubes.

A pipette bulb is used to fill pipettes. It produces a negative pressure which makes the fluid go into the pipette. If one lets air back into the ball the fluid will run out of the pipette.

Most laboratories insist that everyone wears protective goggles. Without them, it is too risky to work with most chemicals. Usually, the lens is a special type of plastic which protects you from both mechanical impacts and acid and base chemicals.

These bottles are used for many purposes. In most laboratories they are usually filled with water, salt, acid or other commonly used fluids. They make it easy to apply the fluid if you do not need to measure a precise amount.

A round-bottomed flask is used for a lot of reactions. Some can be connected to other items, as the frosting on the neck shows. With cork rings they can be placed on a table.

whether the atomic mass will be displayed in the PSE-Table

This sets the leftmost wavelength of the spectrum

whether the atomic mass will be displayed in the PSE-Table

This sets the leftmost wavelength of the spectrum

An amount with which the precision of a measurement can be estimates.

Watchglasses are round glass panes with a diameter of around 5 - 10 cm which are used in the various experimental techniques. The border is bent upwards to allow the watchglass to hold small amounts of liquids in order to let them evaporate. The evaporation can be accelerated by heating the watchglass with a Bunsen burner. Watchglasses can also be used to cover petri dishes or beakers. Moreover watchglasses are suited to weighing small amounts of matter or alternatively drying them in the airing cupboard. The term watchglass is derived from the former pocket watches' protection glass which was often domed.

This is the spectrum of the element

A dehydrator is a laboratory apparatus which is often made of glass and serves to dry chemical matters, that is, to remove water or liquid from a sample. In principle it is a glass bowl with cap which has a planar grinding so that the bowl is air tight closeable. The dehydrator's lower part is ordinarily filled with a drying agent e.g. calcium chloride, silica gel, phosphoric anhydride or sulphuric acid. The sample to be dried is placed on a diaphanous cartridge of plastic or ceramics above the drying agent. The drying agent is hygroscopic, which means that it dehumidifies its environment by absorbing water vapor. The dry atmosphere then takes up water from the sample to be dried.

This page gives an overview about the spectrum this element

This is the spectrum of the element

This sets the rightmost wavelength of the spectrum

This is the spectrum of the element

A dropping funnel can be used to drop precise amounts of fluid. You can control the dropping speed with a valve.

This sets the rightmost wavelength of the spectrum

The Ionic Radius is the radius of a charged atom, a so called ion. The ion can have a positive or a negative charge. The charge of the ion which radius you see is also displayed in Kalzium. A positive ion has less electrons in its shell then the atom, a negative ion has more electrons. Therefore, a postive ion has a smaller radius than its atom and vice versa.

This page gives an overview about the spectrum this element

This rack comes in handy when you want to test many small amounts of chemicals in a row, or if you want to dry test tubes.

This sets the rightmost wavelength of the spectrum

Covalent radius in chemistry corresponds to half of the distance between two identical atomic nuclei, bound by a covalent bond.

The Ionic Radius is the radius of a charged atom, a so called ion. The ion can have a positive or a negative charge. The charge of the ion which radius you see is also displayed in Kalzium. A positive ion has less electrons in its shell then the atom, a negative ion has more electrons. Therefore, a postive ion has a smaller radius than its atom and vice versa.

Most laboratories insist that everyone wears protective goggles. Without them, it is too risky to work with most chemicals. Usually, the lens is a special type of plastic which protects you from both mechanical impacts and acid and base chemicals.

This page gives an overview about the spectrum this element

A vortexer serves to homogenize reagents found in laboratories. The container containing liquid to be homogenized is put on a platform. The platform shakes by rotary agitation up to 3000RPM at which point a contact sensor is activated. In this way extremely small volumes of fluid can be homogenized quickly as well. It is the opposite of a centrifuge, used to separate fluids.

The spatula is a laboratory tool to scrape off, grind and transport chemicals. The material they are made of (e.g. iron, titanium, platinum) and their design (e.g. flat spatula or spoon spatula) can be different.

An amount with which the precision of a measurement can be estimates.