Common laboratory equipments - class-VI

Beaker can be used to make precise measurements of varying volumes. A beakes is basically a broad cylindrical container with a flat bottom. It has a small spout to aid pouring. It also has some graduations for measurement of liquid.

If glass rod is made from reacting compound it will interact with the chemicals in the solution and contaminate the solution. It may cause certain accidents in the laboratory when exposed to certain chemicals. Also, it could be corrosive to atmosphere due to its reactive nature. 

Cork stopper is often used when a reaction is taking place in the flask or test tube and the by product or result of the reaction is desired to be collected. Its basic function is to plug.

It is widely used in fractional distillation. It restrics the vapour of the container from going out, helps in condensation and also restricts moisture to come in contact with the solution.

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

Since glass is a non-crystalline amorphous solid and is silica-based it does not react with chemicals in solution. 

Also, we can control the agitation as we ourselves stir the solution using glass rod.  

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

When flames start coming out of the bottom of the bunsen. One should adjust the collar of the burner so that it is sealed and flames stop coming out.

Cork stopper is often used when a reaction is taking place in the flask or test tube and the by product or result of the reaction is desired to be collected. Its basic function is to plug. 

Glass tubes or glass tubing are hollow pieces of various glass types (like borosilicate, flint, aluminosilicate, soda lime, lead or quartz glass) with a large variety of applications which are laboratory glassware, lighting applications, solar thermal systems and pharmaceutical packaging.

Filtration is a technique that is used to either remoue solid impurites from an inorganic sdution or $two$ isolate an organic solid.

$\rightarrow $ Pipette is a laboratory tool in chemistry to transfer exact volume of liquid from one tube to another.

Volumetric flasks are used to measure volume of liquids .  The liquid has accurate volume when the solution reaches to the corresponding marking on the scale. Volume is usually indicated in mL. During measurement of the volume the vessel must be placed on an even, horizontal support. The required volume is measured when the lower edge of meniscus of the liquid just touches the marking on the vessel.

Buret is a graduated glass tuble with a top at one end, for delivering volumes of liquid. Since, it is graduated, it is most suitable for reading a meniscus.

Evaporating dish has a shallow bottom to increase the surface area of a liquid.
Evaporating dish is used to evaporate volatile solvent from a solution.

Desiccator is used to keep a dehydrated substance from rehydrating.
In desiccator, anhydrous calcium chloride or other suitable dehydrating agent is kept that will remove moisture from atmosphere. Thus, it provides dry atmosphere.

In Burette does a meniscus become of importance.
With the help of meniscus in Burette, we can measure accurate volume of liquid used for the titration

Graduated cylinder is measuring cylinder used to measure the volume of liquid or gas. It has a narrow cylinderial shap. Each marks as line/graduations in cylinder represents the amount of the liquid or gas that has been measured. Thus, it can be used to make precise measurements for the volume of gas collected over wales.

The following is considered to be a dangerous procedure in the laboratory setting
Pushing glass tubing. thermometers. or glass thistle tubes through a rubber cork
During the process, the glass may break and injure our hands.

The hottest part of the flame is the tip of the inner flame which is violet in colour, while the coolest is the whole inner flame.

All the given pair of  compounds are miscible and are soluble in each other. Hence, we can use a glass rod to mix them in the chemistry laboratory. 

Glass rod is hard brittle, transparent, non-crystalline.

Glass tubed or glass tubing are hollow pieces of various glass types with a large variety of applications which are laboratory glassware. They can be cut into various sizes.

Glass is a non-crystalline amorphous solid that is often transparent. Since it is non-crystalline it is brittle in nature. Also, it does not react with chemicals.

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

Glass used in flame test is 10-40 cm in length, 1/2 cm thick and has rounded ends.

A triangular file is any file that has a triangular cross section. The file has three tapered sides, which are used to file the internal surfaces of objects with acute angles.

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. It is generally found in Chemical laboratory as glass ususally does not react with chemicals. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

Silicon dioxide is usually the main constituent of glass. Other components such as lime and metl silicates are used in making of glass. 

Of the many silica-based glasses that exist, ordinary glass is formed from a specific type called soda-lime glass, composed of approximately 75% silicon dioxide, sodium oxide from sodium carbonate, calcium oxide, also called lime, and several minor additives.

Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents.

Pyrex is a brand for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware.

Polypropylene is also used as a component used in production of gas.

Bending a glass tube requires heating it to a pliable state, which is achieved using a Bunsen burner. A glazed file is used to cut the glass, not to bend it.

Cork stopper is often used when a reaction is taking place in the flask or test tube and the by product or result of the reaction is desired to be collected. Its basic function is to plug. Also, it can be used in condenser. 

We have to take following precautions while cutting a glass tube:

• Make a single deep scratch at the desired length with one stroke of file.
  
• To avoid injury, hold the glass tube with the help of a thick piece of cloth or wear protective gloves.
  
• Heat the end using a Bunsen Burner. Do not heat the end for long time. It may seal the end or make it narrow.
  
• Select the tube of sufficient length to keep your hands safe from heat.
  
• While heating, the glass tube should be rotated in order to ensure uniform heating.
  
• Never bend the glass tubing by force. Doing so can break the tubing.
  

Corks are used as stoppers because they are impermeable to liquids and gases, do not contaminate samples with toxic substances, and are manufactured in standard sizes to fit common laboratory glassware.

We have to take following precautions while cutting a glass tube:

Glass tubing is a long, clear tube used as a passage for liquid or gas in experiments. 
Rubber stoppers are used as plugs in flasks or test tubes. 
Rubber tubing is often connected to a condenser, which is a laboratory tool used in the process of distillation. The rubber tubing helps cool water to flow in and out of the condenser and helps the heated water vapor in the condenser return to its liquid state. 

Corks are useful for stopping of volatile substances to go out, stopper, helps in fractional distillations.