what does a positive result of the sulfate test look like?
white precipitate (barium sulfate) formed
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what are the pros and cons of instrumental analysis?
pros: highly accurate, quick, miniscule samples can be analysed, cons: expensive, requires extensive training to use, gives results that can only be interpreted by comparison with other data
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hows does flame emission spectroscopy work?
sample is heated, energy provided causes electrons to jumper into higher energy levels, electrons fall back into lower shells and energy is released as light, wavelengths analysed in a spectrometer
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