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Nalorphene (C_(19)H_(21)NO_(3)), similar to morphine, is used to combat withdrawl symptoms in narcotic users. Does of nalorphene generally given is 1.5 mg. Calculate the mass of 1.5xx10^(-3)m aqueous solution required for the above does. |
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Answer» Solution :`1.5xx10^(-3)" m solution means that "1.5xx10^(-3)" moles of NALORPHENE is dissolved in 1 kg of WATER."` `"Molar MASS of "C_(19)H_(21)NO_(3)=19xx12+21+14+48="311 g mol"^(-1)` `therefore""1.5xx10^(-3)" mole of "C_(19)H_(21)NO_(3)=1.5xx10^(-3)xx"311 g = 0.467 g = 467 mg"` `therefore"Mass of solution = 1000 g + 0.467 g = 1000.467 g"` Thus, for 467 mg of nalorphene, solution REQUIRED= 1000.467 g `therefore` For 1.5 mg of nalorphene, solution required `=(1000.467)/(467)xx1.5=3.21g`. |
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