Q.

On quantitative reaction of urea with sodium hydroxide, NH3  is released which is neutralized by 100 ml of 2 M HCl. Find out amount (gram) of urea required

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answer is 6.

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Detailed Solution

NH2CONH2+2NaOH2NH3+Na2CO3Moles ofNH2CONH2=molesofHCL=100×21000=0.2molesMoles of NH2CONH2=12molesofNH3=12×0.2=0.1Mass of urea = 0.1×60=6 gm

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