Clamps buret

FIGURE L.2 The apparatus typically used for a titration magnetic stirrer flask containing the analyte clamp buret containing the titrant—in this case, potassium hydroxide. 

Adapter, T type, 24/40 Adapters, hose connection with stopcocks, 24/40 joints, one inner, one outer Beaker, 30 mL Beaker, plastic, 400 mL Bottles, wash, 250 mL Card, calibration, polystyrene Cell, NaCl, sandwich Cell, NaCl, wedge Clamps, buret... 

Apparatus, melting point, Fisher-Johns or similar Balance, triple beam Beakers, 400 mL Brush, column Bulb, pipet Clamp, buret... 

Balance, triple beam, 0.01 g Beakers, 100 mL Beakers, 250 mL Bottle, wash, small Brush, test tube Bulb, pipet Cells, quartz, 1 cm Clamps, buret Columns, 2.5 cm x 20 cm Cylinder, graduated, 10 mL Cylinder, graduated, 100 mL Flasks, volumetric, 25 mL Flask, volumetric, 250 mL, bottom only for adding eluting solvent Funnel, 60°, long stem Goggles, safety... 

Beaker, 100 mL 1 Bottle, wash, 250 mL 1 Brush, long handle 1 Bulb, pipet, small 1 Bulb, pipet, large 1 Clamp, buret 1 Clamp, versatile 1 Column, Sephadex, K9/30 1 Cylinder, graduated, 25 mL 1 Dish, weighing, A1 1 Flask, Erlenmeyer, 25 mL 1 Flask, Erlenmeyer, 250 mL 1 Flask, volumetric, 3 mL... 

I Blender, Waring 1 Clamp, buret 1 Column, glass, Icmx 15 cm 1 Cylinder, compressed air or N2 1 Funnel, separatory, 250 mL... 

Beaker, 250 mL Beakers, 400 mL Bulb, pipet, 60 mL Buret, 50 mL Clamp, buret... 

Balance, 0.0 Ig Blade, razor, single edge Brush, test tube Burner, Bunsen Clamp, buret... 

Assemble the apparatus for a titration. The buret should be a 50-mL buret and should be washed thoroughly with a buret brush and soapy water. Clamp the buret to a ring stand with either a buret clamp or an ordinary ring stand clamp. The receiving flask should be a 250-mL Erlenmeyer flask. You should clean and prepare three such flasks. Place a piece of white paper (a page from your notebook will do) on the base of the ring stand. This will help you see the end point better. 

In some cases, the exam question will request a list of the equipment needed, while in other cases you will get a list from which to choose the items you need. Certain items appear in many experiments. These include the analytical balance, beakers, support stands, pipets, test tubes, and Erlenmeyer flasks. Burets, graduated cylinders, clamps, desiccators, drying ovens, pH meters, volumetric flasks, and thermometers are also commonly used. If you are not sure what equipment to choose, these serve as good guesses. Most of the remaining equipment appears in three or fewer experiments. 

Magnetic stir plate 50-ml buret Buret clamp Clamp support Stopcock Small glass funnel... 

Repeat the above procedure with a 100-mL buret and fill it to the 0.0-mL mark with 0.2 N HC1. Clamp this, too, onto a ring stand. 

Clamp a clean, dry 50-mL buret onto the buret stand. Rinse the buret twice with 5-mL portions of iodine solution. Let the rinses run through the tip of the buret and discard them. Fill the buret slightly above the zero mark with a standardized iodine solution. 

Determination of concentration by acid-base titration, including a weak acid or weak base pipet, buret, Erlenmeyer flasks, wash bottle, analytical balance, drying oven, desiccator, support stand and clamp, pH meter... 

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