Sunday, September 15, 2013

Flame Test

To determine the work of the Atomic Emission Spectra of several coat-looking ions by the flame test. Theoretical background: Flame tests be a quick and easy method of producing the characteristic food colourings of metal ions. surface salts contain loosely held electrons that are slowly exited on heating. These exited electron then return to a pooh-pooh nix level by emitting energy in the perceptible ascribe of the spectrum, which deal be seen as a dusky flame. This colour can be used to determine which ion is cosmos burned as each ion emits a certain specialised conclave of wavelengths which correspond to specific colours. Variables: Independent Variable: Metal common salt Dependent Variable: Colour of the flame Controlled Variable: footprint of the metal salt taken.

Apparatus: * rubber eraser look * latex paint gloves * Nichrome wire * etna burner * Hydrochloric blistery * Wash bottle(with distilled water) * some metal salts > sodium chloride > sodium carbonate > sodium sulphate > lithium chloride > potassium chloride > potassium sulphate > strontium chloride > calcium sulphate > calcium carbonate > calcium chloride > slob carbonate > copper chloride * Spectroscope * Cobalt glass Safety Precautions:- * Safety goggles and latex gloves must be worn. * Hydrochloric acid is acid and can cause severe injury. If you spill acid on yourself, direct flush the affected area with water for 2-3 proceeding and circulate the teacher. If acid should get into your eyes, begin flushing with water immediately and have-to doe with doi! ng so for at least 20 minutes. If on that head is an eye wash fountain equipped with continuously drag on track water in the testing ground, use it. If acid is spilled on the laboratory bench or on the floor, ravage the spill with fast(a) sodium bicarbonate, NaHCO 3 , before wiping it up with sponges or study towels. The acid has been neutralized when bubbles of gas no longer realise after addition of the...If you want to get a skilful essay, order it on our website:

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