Monday, October 14, 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 burnishs of metal ions. surface salts contain loosely held electrons that are slowly exited on heating. These exited electron then return to a pooh-pooh get-up-and-go level by emitting energy in the perceptible percent of the spectrum, which evoke be seen as a dusky flame. This colour can be used to determine which ion is cosmos burnt as each ion emits a certain specialised faction of wavelengths which correspond to specific colours. Variables: Independent Variable: Metal flavour Dependent Variable: Colour of the flame Controlled Variable: notice of the metal salt taken.
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Apparatus: * rubber eraser gape * rubber-base paint gloves * Nichrome wire * etna burner * Hydrochloric acerb * Wash bottle(with distilled water) * some metal salts > sodium chloride > sodium carbonate > sodium sulphate > atomic number 3 chloride > potassium chloride > potassium sulphate > strontium chloride > calcium sulphate > calcium carbonate > calcium chloride > blur 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, immediately flush the affected area with water for 2-3 proceeding and enunciate the teacher. If acid should get into your eyes , begin flushing with water immediately and ! affect doing so for at least 20 minutes. If on that transfer is an eye wash fountain equipped with continuously stroller track water in the testing ground, use it. If acid is spilled on the laboratory bench or on the floor, even off 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 chronic realise after addition of the...If you want to get a skilful essay, order it on our website: OrderCustomPaper.com

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