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for the most precise laboratory practicals
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A crystallizing dish is a glass dish with a very large diameter and short height. Its large surface allows for the solution to evaporate faster, which is necessary when recrystallizing compounds, hence its name.
U–tube filled with a sodium hydroxide is used for a cleaned and dried gas. U–tube filled with a 1 mol dm–3 aqueous potassium nitrate solution is used as a permanent salt bridge. U–tube is a device used for water electrolysis, for laboratory hydrogen and oxygen obtaining.
Density bottles are mainly used to determine the density of liquids of moderate viscosity. They are not volumetric instruments, however, they are calibrated ‘to contain ‘ as in the case of volumetric flasks.
A plane mirror is a mirror with a planar reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of incidence is the angle between the incident ray and the surface normal.
Used for weighing samples of chemical substances
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