Why do methylated spirits evaporate faster than water? Explain chemically what happens when soap is added to hard water. Describe the mechanism of the polymerization of styrene. What is it called when an acid is reacted with an alcohol? What is crack nucleation? Is a substance fizzing a compo...
What apparatus is used for a fractional distillation? How is it different from a simple distillation? Why are two distillations required in distillation of ethanol of fermentation mixture? Why do methylated spirits evaporate faster than water?
Ethanol is more effective at a concentration of 50-70 per cent; below 20 per cent, its bactericidal action is negligible. Spirits labelled 95 proof contain only about 47 per cent alcohol. Beware of methylated alcohol, which is very poisonous, and should never be added to drinking water. 20...
than in water. In gradient elutions, say with a water/methanol mobile phase with increasing methanol concentration, the more polar compounds being analyzed will come out first, and the less polar compounds will emerge as the methanol concentration increases. Acetonitrile is used for the same ...
Why do methylated spirits evaporate faster than water? Why is the solubility of butane 6.1 mg / 100 g water, yet hexane is immiscible in water? Explain why solutions of HBr in benzene (a non-polar solvent) are non-conductive, while solutions of HBr ...