Thursday, August 11, 2011
Some help with stock standard concentration question please:-)?
An yst, preparing a stock standard solution, accurately weighed out 20.151mg of oxytetracycline into a 25 ml volumetric flask and dissolved the solute to the mark with ethanol. Calculate the concentration of the stock standard solution in ppm, given that the density of methanol is 0.791gcm^-3
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