Laboratory Equipment Laboratory Equipment ceramic plates divided into

Laboratory Equipment

Laboratory Equipment • ceramic plates divided into small wells or depressions. • used for qualitative analysis • used to perform reactions on a very small amount of materials. Spot Plates • white plates – color formations are seen easier • black plates – white precipitates are seen easier

Laboratory Equipment Burets • used to deliver solution in preciselymeasured, variable volumes. • used primarily for titration, to deliver one reactant until the precise end point of the reaction is reached. Double buret clamp Buret Support stand Buret clamps Thermometer clamp

Laboratory Equipment Ring support Wire Gauze • used to support beakers, flasks, etc. on a ring stand. • recommended for 400 ml and larger glassware. Bunsen Burner • used to heat substances

Laboratory Equipment Crucible Clay Triangle • Used to hold small amounts of chemicals during heating at high temperatures. • The lid covers the bowl so nothing escapes, or to keep oxygen out of the reaction. • used to grasp and take a hot crucible out of a fire or furnace, or to move a crucible. Crucible Tongs

Laboratory Equipment Evaporating Dish • Use an evaporating dish to evaporate a liquid. The solution is boiled using a Bunsen burner and the liquid is driven off as steam (vapour) leaving behind the solid. • no lid

Laboratory Equipment Erlenmeyer Flask Beaker (600 m. L) (250 m. L) • Erlenmeyer flasks and beakers are used for mixing, transporting, and reacting, but not for accurate measurements. • The volumes stamped on the sides are approximate and accurate to within about 5%. Volumetric Flask (250 m. L) • used to make up a solution of fixed volume very accurately. • ± 0. 2 m. L level of uncertainty

Laboratory Equipment Glass Stir Rod Glass Funnel • used to mix or combine two or more substances in a test tube or a beaker • used to transfer liquids to another container and when filtering out solids. Graduated Cylinder • used to measure out accurate volumes of liquid.

3 Way Bulb Volumetric Pipets • used to transfer a specific volume of liquid solution to a container. • Single graduation: 1 -, 5 -, 10 -, 25 -, 50 -, and 100 -m. L Volumetric Bulbs • allows to draw liquid into a pipet and release it from the pipet. Stand Bulb

Laboratory Equipment Watch Glass • used to hold or weigh out a small amount of solid • used to cover a beaker • provides a surface to evaporate a liquid • allows closer observation of precipitates or crystallization, and can be placed on a surface of contrasting color to improve the visibility overall.

Laboratory Equipment Gas-Collecting Jar • used for collecting a gas and qualitative analysis. • to contain a gas or for reactions. Rubber Tubing Gas-Collecting Tube • used for collecting a gas and quantitative analysis.

Laboratory Equipment Test tube brush • Used to clean a test tube Test tube rack Test tube • used to hold and • a small container store test tubes for solutions and reactions Test tube tongs • used to hold a test tube during heating or while still hot.

Triple Beam balance • usually provide less sensitive measurement of mass Analytical Electric balance • used when a high degree of accuracy is needed for the measurement. • used to measure the mass of reagents or laboratory equipment. • wide range of accuracy depending on the intended use.

Centrifuge • used to separate a solid from a solution quickly • A centrifuge is used for small-scale separations; typically the volume is less than 5 m. L. Larger volumes of mixtures can be separated by filtration.

Thermometer • used to measure the temperature of solids, liquids, or gases • contains a liquid (usually mercury or an alcohol solution) in a reservoir. As the temperature increases, the volume increases. • Celsius, Farenheit, or Kelvin, therefore it is important to note which scale thermometer is calibrated for

Laboratory Equipment Eyepiece Lens: the lens at the top that you look through. They are usually 10 X or 15 X power Objective Lens: Usually you will find 3 or 4 objective lenses on a microscope. 4 X, 10 X, 40 X and 100 X powers. When coupled with a 10 X (most common) eyepiece lens, we get total magnifications of 40 X (4 X times 10 X), 100 X , 400 X and 1000 X.

Weighing Boats • used for weighing liquids or solids on a balance. • advantages: Ø bendable, easy transfer of measured samples. Ø smooth surface and rounded corners provide for easy removal of powered and granular samples. Ø Controllable pour off with recessed corners. Ø Resistant to dilute acids, alcohol and bases

Filter Paper • Used to filter a substance out of a solution or an impurity out of a liquid. Examples include: filtration of extracts, oils, beer, syrups etc • Used for qualitative and quantitative analysis • Filtrate – the liquid that has been passed through the filter. • Residue, retentate, or filtrand – solid remaining in the filter paper. • made of super-refined cellulose • different grades of filter paper: different filter rates and retention

Mortar and Pestle • used to grind solids into a powder Mortar and Pestle • used to hold specimens, especially mold and bacteria during their growth

Scoopula Microspatulas • commonly called a spatula. Both are used for moving small amounts of solid from place to place.