Research instruments and chemical: sets the "Monier-Williams", was composed by glass connections thon standards or mounting from the glass standard experiments the connection has Cap. Sets the "Monier-Williams", was composed by glass connections thon standards or mounting from laboratory glass instruments have standard connections.Research chemicals: aqueous hydrogen peroxyd 20 volume: Swung exactly 200 ml of 30% H2O2 solution into the flask 1000 ml. and norms to the starting line with distilled water. Concentrated HCl solution. Aqueous NaOH 0, 1N: Weight 4.5 grams of NaOH mix just enough to 100 ml and then proceed to adjust the concentration of 0.1 N HCl in dich by standard pipe. Bromphenol blue indicator substances. Research herbal licorice dried form are available on the Thanh Hoa city.
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