laboratory-apparatus

laboratory-apparatus

• 1.
  An alcohol lampis a small jar with a special lid that holds a round cotton wick. Most are provided with another lid that fits over the wick to extinguish it and prevent evaporation of the alcohol fuel when not in use. Alcohol inside the jar is drawn up the wick by capillary action and evaporates when it reaches the air. The fumes are ignited, and burn with a temperature of between 500 and 900 degrees F., depending on the location in the flame. Alcohol lamps are normally used when low heat is needed for projects such as woodworking, lab experiments or heating something for a science project. A beaker is a simple container for stirring, mixing and heating liquids commonly used in many laboratories. Beakers are generally cylindrical in shape, with a flat bottom.[1] Most also have a small spout (or "beak") to aid pouring as shown in the picture. Beakers are available in a wide range of sizes, from one millilitre up to several litres. A graduated cylinder, measuring cylinder or mixing cylinder is a common laboratory equipment used to measure the volume of a liquid. Graduated cylinders are generally more accurate and precise than laboratory flasks and beakers. A 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. Like most laboratory glass, stir rods are made of borosilicate (commonly known as pyrex). An Erlenmeyer flask or conical flask[1] is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer, who created it in 1860.[2]
• 2.
  An evaporating dishis a piece of laboratory glassware used for the evaporation of solutions and supernatant liquids,[note1] and sometimes to their melting point. Evaporating dishes are used to evaporate excess solvents - most commonly water - to produce a concentrated solution or a solid precipitate of the dissolved substance. A distilling flask is a piece of laboratory equipment that is used to separate mixtures of two liquids with different boiling points. Distillation occurs when the flask is heated and the components of the mixture change from liquid to gas, with the lowest boiling point liquids changing first and liquids with the highest boiling points changing last. Laboratory funnels are funnels that have been made for use in the chemical laboratory. There are many different kinds of funnels that have been adapted for these specialized applications.
• 3.
  A watch glassis a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. A Pestle and mortar is a device used since ancient times to prepare ingredients or substances by crushing and grinding them into a fine paste or powder. The mortar (/ˈmɔrtər/) is a bowl, typically made of hard wood, ceramic or stone. The pestle (/ˈpɛsəl/) is a heavy club-shaped object, the end of which is used for crushing and grinding. The substance to be ground is placed in the mortar and ground, crushed or mixed using the pestle. A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, "Magnesian stone") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. A laboratory tripod is a piece of three-legged equipment commonly used to conduct experiments in laboratories. It is used as a platform to hold and support glassware, such as beakers and flasks, during experiments and when the glassware is not in use.
• 4.
  A thermometer isa device that measures temperature or a temperature gradient. A thermometer has two important elements: the temperature sensor (e.g. the bulb on a mercury-in-glass thermometer) in which some physical change occurs with temperature, plus some means of converting this physical change into a numerical value (e.g. the visible scale that is marked on a mercury-in-glass thermometer). Test tube racks are commonly used in laboratories to keep test tubes upright so that the equipment does not roll away, spill or become accidentally cracked. Test tubes are delicate equipment, usually made of glass. Slinky is a toy, a precompressed helical spring invented by Richard James in the early 1940s. It can perform a number of tricks, including travelling down a flight of steps end- over-end as it stretches and re-forms itself with the aid of gravity and its own momentum, or appear to levitate for a period of time after it has been dropped.