Instruments in a Chem Lab.pdf

Instruments in a Chem Lab Physics and Chemistry 3rd ESO Used for measuring mass accurately or not so accurately Analytical Scale Balance Scale Used to hold, mix and heat liquids Beaker Erlen-Meyer Flask Frequently used as a heat source in the absence...

Instruments in a Chem Lab Physics and Chemistry 3rd ESO Used for measuring mass accurately or not so accurately Analytical Scale Balance Scale Used to hold, mix and heat liquids Beaker Erlen-Meyer Flask Frequently used as a heat source in the absence of flammable materials Bunsen Burner Alcohol Burner Used in quantitative chemical analysis to measure the volume of a liquid. Burette It consists of a graduated glass tube with a stopcock (turning plug, or spigot) at one end. Used in the laboratory to contain chemical compounds when heated to extremely high temperatures. Crucible with a lid Crucible without a lid Used to transfer small quantities of liquids Dropper Plastic Pipettes Droppers Used to evaporate excess solvents – most commonly water – to produce a concentrated solution or a solid precipitate of the dissolved substance Evaporating Dishes Used to contain chemical reactions run by chemists Round Bottomed Flask Flat Bottomed Flask Used to prepare a solution Volumetric Flask It is used to make up a solution to a known volume. Volumetric flasks are used to measure volumes much more precisely than beakers or Erlenmeyer flasks. Used to filter The use of filter paper in the lab is usually used together with instruments such as filter funnel and a Buchner funnel. Before use, it needs to be folded into a shape that suitable for the experiment Used to filter Filter Funnels Used for vacuum filtration Buchner Funnels Used to measure the volume of a liquid Measuring Cylinder A graduated cylinder, also known as measuring cylinder. It has a narrow cylindrical shape. Each marked line on the graduated cylinder represents the amount of liquid that has been measured Used to grind up solid chemicals into fine powder and crush solids into small pieces Mortar and Pestle Grinding solids into fine powders increases the speed of mixing or reaction processes. The mortar and pestle is a thicker porcelain that is more heavy duty than the evaporating dish. Used to measure out or transfer small quantities of liquid, in volumes of milliliters (mL), microliters (μL). Pipette Volumetric Pipette Used to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. Stand Clamps Used to handle chemicals especially for qualitative experiments and assays Test Tube, Test Tube Rack and Test Tube Holder Test tubes are convenient containers for heating small amounts of liquids or solids with a Bunsen burner or alcohol burner. The tube is usually held by its neck with a clamp or tongs. Used for measuring temperatures other than the human body temperature. It ranges from -10˚C to 110˚C. Thermometer Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances. Used to handle a hot crucible, evaporating dishes, flasks, small beakers or other items which have a high temperature Tongs Laboratory tongs are large pincers for grasping and lifting vessels of heat-resistant material used in high temperature chemical reactions. Used to clean laboratory glassware or other equipment Plastic Wash Bottle They are filled with appropriate cleaning liquids, and poured over the tool that needs to be cleaned Frequently used for weighing solids Watch Glass A watch glass or a clock glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance and as a cover for a beaker