0) 0.1 How many grams of concentrat...
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0) 0.1 How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2 M HNO? The concentrated acid is 70% (w/w) HNO2.

NEET/Medical Exams
Chemistry
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The required number of moles ( =(250 / 1000) times 2 ) ( =0.5 ) moles (no. of moles=molarity ( times ) volume) so,required mass of ( mathrm{HNO} 3=0.5 times 63 ) ( =31.5 ) grams (given mass=no. of moles ( times ) molar mass) Given, 70 grams of HNO3 are present in 100 grams of the solution so,1 gram will be present in ( 100 / 70 ) grams of solution hence 31.5 grams will be present in ( (100 / 70) times 31.5 ) grams of solution. so amount of concentrated nitric acid solution used is 45 grams.
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