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COMMON LABORATORY EQUIPMENT

COMMON LABORATORY EQUIPMENT. FLASKS, BEAKERS, CYLINDERS. Erlenmeyer flask. beaker. 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%.

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COMMON LABORATORY EQUIPMENT

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  1. COMMON LABORATORY EQUIPMENT

  2. FLASKS, BEAKERS, CYLINDERS Erlenmeyer flask beaker 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%.

  3. FLASKS, BEAKERS, CYLINDERS Graduaded cylinder Read at the meniscus Graduated cylinders are useful for measuring liquid volumes to within about 1%. They are for general purpose use, but not for quantitative analysis. If greater accuracy is needed, use a pipet or volumetric flask.

  4. Volumetrics flasks A volumetric flask is used to make up a solution of fixed volume very accurately.

  5. BURET A buret is used to deliver solution in precisely-measured, variable volumes. Burets are used primarily for titration, to deliver one reactant until the precise end point of the reaction is reached.

  6. USING A BURET Deliver solution to the titration flask by turning the stopcock. To fill a buret, close the stopcock at the bottom and use a funnel. Read the bottom of the meniscus. Be sure your eye is at the level of meniscus, not above or below. Check the tip of the buret for air bubble. Remove air bubble. If an air bubble is present during a titration, volume readings may be in error.

  7. PIPETS Rubber pipet filler Bulb pipets A pipet is used to measure small amounts of solution very accurately. Pipet rack Graduated pipets

  8. AUTOMATICS PIPETS An automatic pipet is used to deliver solution in precisely-measured, variable volumes Disposable pipette tips

  9. DIVERSES Petri dish glass Cuvettes = spectrophotometric cells Test tubes dessicator Oven vials

  10. DIVERSES Lab coat Fire blanket extinguisher Safety goggles Fume hood

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